diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 5e981b06..0302e902 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -80,7 +80,7 @@ Please provide tests for your contribution.
 To generate a new fixture for Markdown output run
 
 ```bash
-./lib/cli.js --no-banner -a __tests__/fixtures/<action>.yml | \ 
+./lib/cli.js --no-banner -s __tests__/fixtures/<action>.yml | \ 
   tail -r | tail -n +2 | tail -r > <action_md>.output
 ```
 
@@ -88,7 +88,7 @@ For creating a README.md fixture, first create the readme input file for the tes
 
 
 ```bash
-./lib/cli.js --no-banner -a __tests__/fixtures/<action>.yml -u __tests_/fixtures/<readme>.output
+./lib/cli.js --no-banner -s __tests__/fixtures/<action>.yml -u __tests_/fixtures/<readme>.output
 ```
 
 ### Use a Consistent Coding Style
diff --git a/README.md b/README.md
index 49900887..ab5cf237 100644
--- a/README.md
+++ b/README.md
@@ -13,21 +13,21 @@ A CLI to generate and update documentation for GitHub actions or workflows, base
 ### Add the following comment blocks to your README.md
 
 ```md
-<!-- action-docs-header action="action.yml" -->
+<!-- action-docs-header source="action.yml" -->
 
-<!-- action-docs-description action="action.yml" --> # applicable for actions only
+<!-- action-docs-description source="action.yml" --> # applicable for actions only
 
-<!-- action-docs-inputs action="action.yml" -->
+<!-- action-docs-inputs source="action.yml" -->
 
-<!-- action-docs-outputs action="action.yml" -->
+<!-- action-docs-outputs source="action.yml" -->
 
-<!-- action-docs-runs action="action.yml" --> # applicable for actions only
+<!-- action-docs-runs source="action.yml" --> # applicable for actions only
 ```
 
 Optionally you can also add the following section to generate a usage guide, replacing \<project\> and \<version\> with the name and version of your project you would like to appear in your usage guide.
 
 ```md
-<!-- action-docs-usage action="action.yml" project="<project>" version="<version>" -->
+<!-- action-docs-usage source="action.yml" project="<project>" version="<version>" -->
 ```
 
 ### Generate docs via CLI
@@ -57,15 +57,18 @@ The following options are available via the CLI
 
 ```
 Options:
-      --help                  Show help                                       [boolean]
-      --version               Show version number                             [boolean]
-  -t, --toc-level             TOC level used for markdown         [number] [default: 2]
-  -a, --action                GitHub action file       [string] [default: "action.yml"]
-      --no-banner             Print no banner
-  -u, --update-readme         Update readme file.                              [string]
-  -l, --line-breaks           Used line breaks in the generated docs.
-                                 [string] [choices: "CR", "LF", "CRLF"] [default: "LF"]
-  -n, --include-name-header   Include a header with the action/workflow name.
+      --version              Show version number                       [boolean]
+  -t, --toc-level            TOC level used for markdown   [number] [default: 2]
+  -a, --action               GitHub action file
+             [deprecated: use "source" instead] [string] [default: "action.yml"]
+  -s, --source               GitHub source file [string] [default: "action.yml"]
+      --no-banner            Print no banner
+  -u, --update-readme        Update readme file.                        [string]
+  -l, --line-breaks          Used line breaks in the generated docs.
+                          [string] [choices: "CR", "LF", "CRLF"] [default: "LF"]
+  -n, --include-name-header  Include a header with the action/workflow name
+                                                                       [boolean]
+      --help                 Show help                                 [boolean]
 ```
 
 ### Update the README
@@ -73,23 +76,23 @@ Options:
 Action-docs can update your README based on the `action.yml`. The following sections can be updated: description, inputs, outputs and runs. Add the following tags to your README and run `action-docs -u`.
 
 ```md
-<!-- action-docs-header action="action.yml" -->
+<!-- action-docs-header source="action.yml" -->
 
-<!-- action-docs-description action="action.yml" -->
+<!-- action-docs-description source="action.yml" -->
 
-<!-- action-docs-inputs action="action.yml" -->
+<!-- action-docs-inputs source="action.yml" -->
 
-<!-- action-docs-outputs action="action.yml" -->
+<!-- action-docs-outputs source="action.yml" -->
 
-<!-- action-docs-runs action="action.yml" -->
+<!-- action-docs-runs source="action.yml" -->
 ```
 
 For updating other Markdown files add the name of the file to the command `action-docs -u <file>`.
 
 If you need to use `another/action.yml`:
 
-1. write it in tags like `action="another/action.yml"`;
-1. specify in a command via the `-a` option like `action-docs -a another/action.yml`
+1. write it in tags like `source="another/action.yml"`;
+1. specify in a command via the `-s` option like `action-docs -s another/action.yml`
 
 ### Examples
 
@@ -108,13 +111,13 @@ action-docs --update-readme
 #### Print action markdown for non default action file
 
 ```bash
-action-docs --action another/action.yaml
+action-docs --source another/action.yaml
 ```
 
 #### Update readme, custom action file and set TOC level 3, custom readme
 
 ```bash
-action-docs --action ./some-dir/action.yml --toc-level 3 --update-readme docs.md
+action-docs --source ./some-dir/action.yml --toc-level 3 --update-readme docs.md
 ```
 
 ## API
diff --git a/__tests__/cli.test.ts b/__tests__/cli.test.ts
index 4a91a47f..679fa083 100644
--- a/__tests__/cli.test.ts
+++ b/__tests__/cli.test.ts
@@ -26,7 +26,7 @@ describe("CLI tests", () => {
 
   test("Console output with TOC 3 and no banner.", async () => {
     const result = await cli(
-      `-a ${path.join(fixtureDir, "all_fields_action.yml")} -t 3 --no-banner`,
+      `-s ${path.join(fixtureDir, "all_fields_action.yml")} -t 3 --no-banner`,
     );
 
     const expected = <string>(
@@ -42,7 +42,7 @@ describe("CLI tests", () => {
 
   test("Console output including name header and no banner.", async () => {
     const result = await cli(
-      `-a ${path.join(fixtureDir, "action.yml")} -n true --no-banner`,
+      `-s ${path.join(fixtureDir, "action.yml")} -n true --no-banner`,
     );
 
     const expected = <string>(
@@ -88,7 +88,7 @@ async function testReadme(
   const original = <string>readFileSync(originalReadme, "utf-8");
 
   const result = await cli(
-    `-u ${originalReadme} -a ${actionFile} ${extraArgs}`,
+    `-u ${originalReadme} -s ${actionFile} ${extraArgs}`,
   );
   expect(result.code).toBe(exitCode);
 
diff --git a/__tests__/fixtures/action/action_docs_action_readme.input b/__tests__/fixtures/action/action_docs_action_readme.input
index b5c49f07..4340117c 100644
--- a/__tests__/fixtures/action/action_docs_action_readme.input
+++ b/__tests__/fixtures/action/action_docs_action_readme.input
@@ -1 +1 @@
-<!-- action-docs-inputs action="__tests__/fixtures/action/action_docs_action_action.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/action/action_docs_action_action.yml" -->
diff --git a/__tests__/fixtures/action/action_docs_action_readme.output b/__tests__/fixtures/action/action_docs_action_readme.output
index d924d3b7..2859f741 100644
--- a/__tests__/fixtures/action/action_docs_action_readme.output
+++ b/__tests__/fixtures/action/action_docs_action_readme.output
@@ -1,4 +1,4 @@
-<!-- action-docs-inputs action="__tests__/fixtures/action/action_docs_action_action.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/action/action_docs_action_action.yml" -->
 ## Inputs
 
 | name | description | required | default |
@@ -7,4 +7,4 @@
 | `actionFile` | <p>The action definition file.</p> | `false` | `action.yml` |
 | `tocLevel` | <p>TOC level used for the headers.</p> | `false` | `2` |
 | `lineBreaks` | <p>Line breaks to be used in updated readme (LF|CR|CRLF).</p> | `false` | `LF` |
-<!-- action-docs-inputs action="__tests__/fixtures/action/action_docs_action_action.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/action/action_docs_action_action.yml" -->
diff --git a/__tests__/fixtures/action/action_usage_readme.input b/__tests__/fixtures/action/action_usage_readme.input
index 1ece7460..a2ea167e 100644
--- a/__tests__/fixtures/action/action_usage_readme.input
+++ b/__tests__/fixtures/action/action_usage_readme.input
@@ -1 +1 @@
-<!-- action-docs-usage action="__tests__/fixtures/action/action.yml" project="npalm/action-docs" version="v1" -->
+<!-- action-docs-usage source="__tests__/fixtures/action/action.yml" project="npalm/action-docs" version="v1" -->
diff --git a/__tests__/fixtures/action/action_usage_readme.output b/__tests__/fixtures/action/action_usage_readme.output
index c3599e14..acceeb00 100644
--- a/__tests__/fixtures/action/action_usage_readme.output
+++ b/__tests__/fixtures/action/action_usage_readme.output
@@ -1,4 +1,4 @@
-<!-- action-docs-usage action="__tests__/fixtures/action/action.yml" project="npalm/action-docs" version="v1" -->
+<!-- action-docs-usage source="__tests__/fixtures/action/action.yml" project="npalm/action-docs" version="v1" -->
 ## Usage
 
 ```yaml
@@ -22,4 +22,4 @@
     # Required: false
     # Default: test
 ```
-<!-- action-docs-usage action="__tests__/fixtures/action/action.yml" project="npalm/action-docs" version="v1" -->
+<!-- action-docs-usage source="__tests__/fixtures/action/action.yml" project="npalm/action-docs" version="v1" -->
diff --git a/__tests__/fixtures/action/all_fields_readme.input b/__tests__/fixtures/action/all_fields_readme.input
index e8d2547d..a7331adf 100644
--- a/__tests__/fixtures/action/all_fields_readme.input
+++ b/__tests__/fixtures/action/all_fields_readme.input
@@ -1,11 +1,11 @@
-<!-- action-docs-header action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-header source="__tests__/fixtures/action/all_fields_action.yml" -->
 
-<!-- action-docs-description action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-description source="__tests__/fixtures/action/all_fields_action.yml" -->
 
-<!-- action-docs-usage action="__tests__/fixtures/action/all_fields_action.yml" project="npalm/action-docs" version="v1" -->
+<!-- action-docs-usage source="__tests__/fixtures/action/all_fields_action.yml" project="npalm/action-docs" version="v1" -->
 
-<!-- action-docs-inputs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/action/all_fields_action.yml" -->
 
-<!-- action-docs-outputs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-outputs source="__tests__/fixtures/action/all_fields_action.yml" -->
 
-<!-- action-docs-runs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-runs source="__tests__/fixtures/action/all_fields_action.yml" -->
diff --git a/__tests__/fixtures/action/all_fields_readme.input.crlf b/__tests__/fixtures/action/all_fields_readme.input.crlf
index f8ed910e..5c15f53f 100644
--- a/__tests__/fixtures/action/all_fields_readme.input.crlf
+++ b/__tests__/fixtures/action/all_fields_readme.input.crlf
@@ -1,7 +1,7 @@
-<!-- action-docs-description action="__tests__/fixtures/action/all_fields_action.yml.crlf" -->
+<!-- action-docs-description source="__tests__/fixtures/action/all_fields_action.yml.crlf" -->
 
-<!-- action-docs-inputs action="__tests__/fixtures/action/all_fields_action.yml.crlf" -->
+<!-- action-docs-inputs source="__tests__/fixtures/action/all_fields_action.yml.crlf" -->
 
-<!-- action-docs-outputs action="__tests__/fixtures/action/all_fields_action.yml.crlf" -->
+<!-- action-docs-outputs source="__tests__/fixtures/action/all_fields_action.yml.crlf" -->
 
-<!-- action-docs-runs action="__tests__/fixtures/action/all_fields_action.yml.crlf" -->
+<!-- action-docs-runs source="__tests__/fixtures/action/all_fields_action.yml.crlf" -->
diff --git a/__tests__/fixtures/action/all_fields_readme.output b/__tests__/fixtures/action/all_fields_readme.output
index 6a1de0e6..1af27309 100644
--- a/__tests__/fixtures/action/all_fields_readme.output
+++ b/__tests__/fixtures/action/all_fields_readme.output
@@ -1,14 +1,14 @@
-<!-- action-docs-header action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-header source="__tests__/fixtures/action/all_fields_action.yml" -->
 ## An Action
-<!-- action-docs-header action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-header source="__tests__/fixtures/action/all_fields_action.yml" -->
 
-<!-- action-docs-description action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-description source="__tests__/fixtures/action/all_fields_action.yml" -->
 ### Description
 
 Default test
-<!-- action-docs-description action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-description source="__tests__/fixtures/action/all_fields_action.yml" -->
 
-<!-- action-docs-usage action="__tests__/fixtures/action/all_fields_action.yml" project="npalm/action-docs" version="v1" -->
+<!-- action-docs-usage source="__tests__/fixtures/action/all_fields_action.yml" project="npalm/action-docs" version="v1" -->
 ### Usage
 
 ```yaml
@@ -44,9 +44,9 @@ Default test
     # Required: false
     # Default: false
 ```
-<!-- action-docs-usage action="__tests__/fixtures/action/all_fields_action.yml" project="npalm/action-docs" version="v1" -->
+<!-- action-docs-usage source="__tests__/fixtures/action/all_fields_action.yml" project="npalm/action-docs" version="v1" -->
 
-<!-- action-docs-inputs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/action/all_fields_action.yml" -->
 ### Inputs
 
 | name | description | required | default |
@@ -56,19 +56,19 @@ Default test
 | `inputC` | <p>A description C</p> | `true` | `C` |
 | `inputD` | <p>A description D</p> | `false` | `D` |
 | `inputE` | <p>A description E</p> | `false` | `false` |
-<!-- action-docs-inputs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/action/all_fields_action.yml" -->
 
-<!-- action-docs-outputs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-outputs source="__tests__/fixtures/action/all_fields_action.yml" -->
 ### Outputs
 
 | name | description |
 | --- | --- |
 | `outputA` | <p>A description A</p> |
 | `outputB` | <p>A description B</p> |
-<!-- action-docs-outputs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-outputs source="__tests__/fixtures/action/all_fields_action.yml" -->
 
-<!-- action-docs-runs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-runs source="__tests__/fixtures/action/all_fields_action.yml" -->
 ### Runs
 
 This action is a `node12` action.
-<!-- action-docs-runs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-runs source="__tests__/fixtures/action/all_fields_action.yml" -->
diff --git a/__tests__/fixtures/action/all_fields_readme.output.crlf b/__tests__/fixtures/action/all_fields_readme.output.crlf
index e92a4cc0..c7024423 100644
--- a/__tests__/fixtures/action/all_fields_readme.output.crlf
+++ b/__tests__/fixtures/action/all_fields_readme.output.crlf
@@ -1,10 +1,10 @@
-<!-- action-docs-description action="__tests__/fixtures/action/all_fields_action.yml.crlf" -->
+<!-- action-docs-description source="__tests__/fixtures/action/all_fields_action.yml.crlf" -->
 ## Description
 
 Default test
-<!-- action-docs-description action="__tests__/fixtures/action/all_fields_action.yml.crlf" -->
+<!-- action-docs-description source="__tests__/fixtures/action/all_fields_action.yml.crlf" -->
 
-<!-- action-docs-inputs action="__tests__/fixtures/action/all_fields_action.yml.crlf" -->
+<!-- action-docs-inputs source="__tests__/fixtures/action/all_fields_action.yml.crlf" -->
 ## Inputs
 
 | name | description | required | default |
@@ -14,19 +14,19 @@ Default test
 | `inputC` | <p>A description C</p> | `true` | `C` |
 | `inputD` | <p>A description D</p> | `false` | `D` |
 | `inputE` | <p>A description E</p> | `false` | `false` |
-<!-- action-docs-inputs action="__tests__/fixtures/action/all_fields_action.yml.crlf" -->
+<!-- action-docs-inputs source="__tests__/fixtures/action/all_fields_action.yml.crlf" -->
 
-<!-- action-docs-outputs action="__tests__/fixtures/action/all_fields_action.yml.crlf" -->
+<!-- action-docs-outputs source="__tests__/fixtures/action/all_fields_action.yml.crlf" -->
 ## Outputs
 
 | name | description |
 | --- | --- |
 | `outputA` | <p>A description A</p> |
 | `outputB` | <p>A description B</p> |
-<!-- action-docs-outputs action="__tests__/fixtures/action/all_fields_action.yml.crlf" -->
+<!-- action-docs-outputs source="__tests__/fixtures/action/all_fields_action.yml.crlf" -->
 
-<!-- action-docs-runs action="__tests__/fixtures/action/all_fields_action.yml.crlf" -->
+<!-- action-docs-runs source="__tests__/fixtures/action/all_fields_action.yml.crlf" -->
 ## Runs
 
 This action is a `node12` action.
-<!-- action-docs-runs action="__tests__/fixtures/action/all_fields_action.yml.crlf" -->
+<!-- action-docs-runs source="__tests__/fixtures/action/all_fields_action.yml.crlf" -->
diff --git a/__tests__/fixtures/action/all_fields_readme_filled.input b/__tests__/fixtures/action/all_fields_readme_filled.input
index ba6a5ae6..b4ea42b2 100644
--- a/__tests__/fixtures/action/all_fields_readme_filled.input
+++ b/__tests__/fixtures/action/all_fields_readme_filled.input
@@ -1,12 +1,12 @@
-<!-- action-docs-description action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-description source="__tests__/fixtures/action/all_fields_action.yml" -->
 ## Description
 
 Default test
 
 
-<!-- action-docs-description action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-description source="__tests__/fixtures/action/all_fields_action.yml" -->
 
-<!-- action-docs-inputs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/action/all_fields_action.yml" -->
 ## Inputs
 
 | name | description | required | default |
@@ -19,9 +19,9 @@ Default test
 
 
 
-<!-- action-docs-inputs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/action/all_fields_action.yml" -->
 
-<!-- action-docs-outputs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-outputs source="__tests__/fixtures/action/all_fields_action.yml" -->
 ## Outputs
 
 | name | description |
@@ -31,12 +31,12 @@ Default test
 
 
 
-<!-- action-docs-outputs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-outputs source="__tests__/fixtures/action/all_fields_action.yml" -->
 
-<!-- action-docs-runs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-runs source="__tests__/fixtures/action/all_fields_action.yml" -->
 ## Run
 
 This action is a `docker` action.
 
 
-<!-- action-docs-runs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-runs source="__tests__/fixtures/action/all_fields_action.yml" -->
diff --git a/__tests__/fixtures/action/all_fields_readme_filled.output b/__tests__/fixtures/action/all_fields_readme_filled.output
index 66747afc..48a6d08d 100644
--- a/__tests__/fixtures/action/all_fields_readme_filled.output
+++ b/__tests__/fixtures/action/all_fields_readme_filled.output
@@ -1,10 +1,10 @@
-<!-- action-docs-description action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-description source="__tests__/fixtures/action/all_fields_action.yml" -->
 ## Description
 
 Default test
-<!-- action-docs-description action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-description source="__tests__/fixtures/action/all_fields_action.yml" -->
 
-<!-- action-docs-inputs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/action/all_fields_action.yml" -->
 ## Inputs
 
 | name | description | required | default |
@@ -14,19 +14,19 @@ Default test
 | `inputC` | <p>A description C</p> | `true` | `C` |
 | `inputD` | <p>A description D</p> | `false` | `D` |
 | `inputE` | <p>A description E</p> | `false` | `false` |
-<!-- action-docs-inputs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/action/all_fields_action.yml" -->
 
-<!-- action-docs-outputs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-outputs source="__tests__/fixtures/action/all_fields_action.yml" -->
 ## Outputs
 
 | name | description |
 | --- | --- |
 | `outputA` | <p>A description A</p> |
 | `outputB` | <p>A description B</p> |
-<!-- action-docs-outputs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-outputs source="__tests__/fixtures/action/all_fields_action.yml" -->
 
-<!-- action-docs-runs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-runs source="__tests__/fixtures/action/all_fields_action.yml" -->
 ## Runs
 
 This action is a `node12` action.
-<!-- action-docs-runs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-runs source="__tests__/fixtures/action/all_fields_action.yml" -->
diff --git a/__tests__/fixtures/action/all_fields_readme_header.output b/__tests__/fixtures/action/all_fields_readme_header.output
index b434acfe..9d1d70c4 100644
--- a/__tests__/fixtures/action/all_fields_readme_header.output
+++ b/__tests__/fixtures/action/all_fields_readme_header.output
@@ -1,14 +1,14 @@
-<!-- action-docs-header action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-header source="__tests__/fixtures/action/all_fields_action.yml" -->
 # Test Action
-<!-- action-docs-header action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-header source="__tests__/fixtures/action/all_fields_action.yml" -->
 
-<!-- action-docs-description action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-description source="__tests__/fixtures/action/all_fields_action.yml" -->
 ## Description
 
 Default test
-<!-- action-docs-description action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-description source="__tests__/fixtures/action/all_fields_action.yml" -->
 
-<!-- action-docs-usage action="__tests__/fixtures/action/all_fields_action.yml" project="npalm/action-docs" version="v1" -->
+<!-- action-docs-usage source="__tests__/fixtures/action/all_fields_action.yml" project="npalm/action-docs" version="v1" -->
 ## Usage
 
 ```yaml
@@ -46,9 +46,9 @@ Default test
 ```
 
 
-<!-- action-docs-usage action="__tests__/fixtures/action/all_fields_action.yml" project="npalm/action-docs" version="v1" -->
+<!-- action-docs-usage source="__tests__/fixtures/action/all_fields_action.yml" project="npalm/action-docs" version="v1" -->
 
-<!-- action-docs-inputs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/action/all_fields_action.yml" -->
 ## Inputs
 
 | name | description | required | default |
@@ -58,19 +58,19 @@ Default test
 | `inputC` | <p>A description C</p> | `true` | `C` |
 | `inputD` | <p>A description D</p> | `false` | `D` |
 | `inputE` | <p>A description E</p> | `false` | `false` |
-<!-- action-docs-inputs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/action/all_fields_action.yml" -->
 
-<!-- action-docs-outputs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-outputs source="__tests__/fixtures/action/all_fields_action.yml" -->
 ## Outputs
 
 | name | description |
 | --- | --- |
 | `outputA` | <p>A description A</p> |
 | `outputB` | <p>A description B</p> |
-<!-- action-docs-outputs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-outputs source="__tests__/fixtures/action/all_fields_action.yml" -->
 
-<!-- action-docs-runs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-runs source="__tests__/fixtures/action/all_fields_action.yml" -->
 ## Runs
 
 This action is a `node12` action.
-<!-- action-docs-runs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-runs source="__tests__/fixtures/action/all_fields_action.yml" -->
diff --git a/__tests__/fixtures/action/all_fields_usage_readme.input b/__tests__/fixtures/action/all_fields_usage_readme.input
index edfa45de..1226a938 100644
--- a/__tests__/fixtures/action/all_fields_usage_readme.input
+++ b/__tests__/fixtures/action/all_fields_usage_readme.input
@@ -1 +1 @@
-<!-- action-docs-usage action="__tests__/fixtures/action/all_fields_action.yml" project="npalm/action-docs" version="v1" -->
+<!-- action-docs-usage source="__tests__/fixtures/action/all_fields_action.yml" project="npalm/action-docs" version="v1" -->
diff --git a/__tests__/fixtures/action/all_fields_usage_readme.output b/__tests__/fixtures/action/all_fields_usage_readme.output
index ab9c69a2..0bd7c8cc 100644
--- a/__tests__/fixtures/action/all_fields_usage_readme.output
+++ b/__tests__/fixtures/action/all_fields_usage_readme.output
@@ -1,4 +1,4 @@
-<!-- action-docs-usage action="__tests__/fixtures/action/all_fields_action.yml" project="npalm/action-docs" version="v1" -->
+<!-- action-docs-usage source="__tests__/fixtures/action/all_fields_action.yml" project="npalm/action-docs" version="v1" -->
 ## Usage
 
 ```yaml
@@ -34,4 +34,4 @@
     # Required: false
     # Default: false
 ```
-<!-- action-docs-usage action="__tests__/fixtures/action/all_fields_action.yml" project="npalm/action-docs" version="v1" -->
+<!-- action-docs-usage source="__tests__/fixtures/action/all_fields_action.yml" project="npalm/action-docs" version="v1" -->
diff --git a/__tests__/fixtures/action/two_actions_readme.input b/__tests__/fixtures/action/two_actions_readme.input
index 72f32166..44c1d5c1 100644
--- a/__tests__/fixtures/action/two_actions_readme.input
+++ b/__tests__/fixtures/action/two_actions_readme.input
@@ -1,4 +1,4 @@
-<!-- action-docs-inputs action="__tests__/fixtures/action/action_docs_action_action.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/action/action_docs_action_action.yml" -->
 ## Inputs
 
 | name | description | required | default |
@@ -7,6 +7,6 @@
 | `actionFile` | <p>The action definition file.</p> | `false` | `action.yml` |
 | `tocLevel` | <p>TOC level used for the headers.</p> | `false` | `2` |
 | `lineBreaks` | <p>Line breaks to be used in updated readme (LF|CR|CRLF).</p> | `false` | `LF` |
-<!-- action-docs-inputs action="__tests__/fixtures/action/action_docs_action_action.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/action/action_docs_action_action.yml" -->
 
-<!-- action-docs-outputs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-outputs source="__tests__/fixtures/action/all_fields_action.yml" -->
diff --git a/__tests__/fixtures/action/two_actions_readme.output b/__tests__/fixtures/action/two_actions_readme.output
index 0a4ecb6e..66b1c8ca 100644
--- a/__tests__/fixtures/action/two_actions_readme.output
+++ b/__tests__/fixtures/action/two_actions_readme.output
@@ -1,4 +1,4 @@
-<!-- action-docs-inputs action="__tests__/fixtures/action/action_docs_action_action.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/action/action_docs_action_action.yml" -->
 ## Inputs
 
 | name | description | required | default |
@@ -7,13 +7,13 @@
 | `actionFile` | <p>The action definition file.</p> | `false` | `action.yml` |
 | `tocLevel` | <p>TOC level used for the headers.</p> | `false` | `2` |
 | `lineBreaks` | <p>Line breaks to be used in updated readme (LF|CR|CRLF).</p> | `false` | `LF` |
-<!-- action-docs-inputs action="__tests__/fixtures/action/action_docs_action_action.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/action/action_docs_action_action.yml" -->
 
-<!-- action-docs-outputs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-outputs source="__tests__/fixtures/action/all_fields_action.yml" -->
 ## Outputs
 
 | name | description |
 | --- | --- |
 | `outputA` | <p>A description A</p> |
 | `outputB` | <p>A description B</p> |
-<!-- action-docs-outputs action="__tests__/fixtures/action/all_fields_action.yml" -->
+<!-- action-docs-outputs source="__tests__/fixtures/action/all_fields_action.yml" -->
diff --git a/__tests__/fixtures/workflow/action_docs_workflow_readme.input b/__tests__/fixtures/workflow/action_docs_workflow_readme.input
index 62017e53..e4308b60 100644
--- a/__tests__/fixtures/workflow/action_docs_workflow_readme.input
+++ b/__tests__/fixtures/workflow/action_docs_workflow_readme.input
@@ -1 +1 @@
-<!-- action-docs-inputs action="__tests__/fixtures/workflow/action_docs_workflow.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/workflow/action_docs_workflow.yml" -->
diff --git a/__tests__/fixtures/workflow/action_docs_workflow_readme.output b/__tests__/fixtures/workflow/action_docs_workflow_readme.output
index 8fad89cb..e4f6835b 100644
--- a/__tests__/fixtures/workflow/action_docs_workflow_readme.output
+++ b/__tests__/fixtures/workflow/action_docs_workflow_readme.output
@@ -1,4 +1,4 @@
-<!-- action-docs-inputs action="__tests__/fixtures/workflow/action_docs_workflow.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/workflow/action_docs_workflow.yml" -->
 ### Inputs
 
 | name | description | type | required | default |
@@ -7,4 +7,4 @@
 | `actionFile` | <p>The action definition file.</p> | `string` | `false` | `action.yml` |
 | `tocLevel` | <p>TOC level used for the headers.</p> | `string` | `false` | `2` |
 | `lineBreaks` | <p>Line breaks to be used in updated readme (LF|CR|CRLF).</p> | `string` | `false` | `LF` |
-<!-- action-docs-inputs action="__tests__/fixtures/workflow/action_docs_workflow.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/workflow/action_docs_workflow.yml" -->
diff --git a/__tests__/fixtures/workflow/all_fields_readme.input b/__tests__/fixtures/workflow/all_fields_readme.input
index 8b604b15..e1c89117 100644
--- a/__tests__/fixtures/workflow/all_fields_readme.input
+++ b/__tests__/fixtures/workflow/all_fields_readme.input
@@ -1,7 +1,7 @@
-<!-- action-docs-header action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-header source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
 
-<!-- action-docs-usage action="__tests__/fixtures/workflow/all_fields_workflow.yml" project="npalm/action-docs" version="v1" -->
+<!-- action-docs-usage source="__tests__/fixtures/workflow/all_fields_workflow.yml" project="npalm/action-docs" version="v1" -->
 
-<!-- action-docs-inputs action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
 
-<!-- action-docs-outputs action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-outputs source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
diff --git a/__tests__/fixtures/workflow/all_fields_readme.input.crlf b/__tests__/fixtures/workflow/all_fields_readme.input.crlf
index 53cf3f12..c0413e77 100644
--- a/__tests__/fixtures/workflow/all_fields_readme.input.crlf
+++ b/__tests__/fixtures/workflow/all_fields_readme.input.crlf
@@ -1,5 +1,5 @@
-<!-- action-docs-header action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-header source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
 
-<!-- action-docs-inputs action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
 
-<!-- action-docs-outputs action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-outputs source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
diff --git a/__tests__/fixtures/workflow/all_fields_readme.output b/__tests__/fixtures/workflow/all_fields_readme.output
index 938d16c9..b1d23544 100644
--- a/__tests__/fixtures/workflow/all_fields_readme.output
+++ b/__tests__/fixtures/workflow/all_fields_readme.output
@@ -1,8 +1,8 @@
-<!-- action-docs-header action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-header source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
 ## A Workflow
-<!-- action-docs-header action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-header source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
 
-<!-- action-docs-usage action="__tests__/fixtures/workflow/all_fields_workflow.yml" project="npalm/action-docs" version="v1" -->
+<!-- action-docs-usage source="__tests__/fixtures/workflow/all_fields_workflow.yml" project="npalm/action-docs" version="v1" -->
 ### Usage
 
 ```yaml
@@ -45,9 +45,9 @@ jobs:
       # Required: false
       # Default: false
 ```
-<!-- action-docs-usage action="__tests__/fixtures/workflow/all_fields_workflow.yml" project="npalm/action-docs" version="v1" -->
+<!-- action-docs-usage source="__tests__/fixtures/workflow/all_fields_workflow.yml" project="npalm/action-docs" version="v1" -->
 
-<!-- action-docs-inputs action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
 ### Inputs
 
 | name | description | type | required | default |
@@ -57,13 +57,13 @@ jobs:
 | `inputC` | <p>A description C</p> | `string` | `true` | `C` |
 | `inputD` | <p>A description D</p> | `string` | `false` | `D` |
 | `inputE` | <p>A description E</p> | `string` | `false` | `false` |
-<!-- action-docs-inputs action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
 
-<!-- action-docs-outputs action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-outputs source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
 ### Outputs
 
 | name | description |
 | --- | --- |
 | `outputA` | <p>A description A</p> |
 | `outputB` | <p>A description B</p> |
-<!-- action-docs-outputs action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-outputs source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
diff --git a/__tests__/fixtures/workflow/all_fields_readme.output.crlf b/__tests__/fixtures/workflow/all_fields_readme.output.crlf
index a4ef46c5..12433a66 100644
--- a/__tests__/fixtures/workflow/all_fields_readme.output.crlf
+++ b/__tests__/fixtures/workflow/all_fields_readme.output.crlf
@@ -1,8 +1,8 @@
-<!-- action-docs-header action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-header source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
 ## A Workflow
-<!-- action-docs-header action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-header source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
 
-<!-- action-docs-inputs action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
 ### Inputs
 
 | name | description | type | required | default |
@@ -12,13 +12,13 @@
 | `inputC` | <p>A description C</p> | `string` | `true` | `C` |
 | `inputD` | <p>A description D</p> | `string` | `false` | `D` |
 | `inputE` | <p>A description E</p> | `string` | `false` | `false` |
-<!-- action-docs-inputs action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
 
-<!-- action-docs-outputs action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-outputs source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
 ### Outputs
 
 | name | description |
 | --- | --- |
 | `outputA` | <p>A description A</p> |
 | `outputB` | <p>A description B</p> |
-<!-- action-docs-outputs action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-outputs source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
diff --git a/__tests__/fixtures/workflow/all_fields_readme_filled.input b/__tests__/fixtures/workflow/all_fields_readme_filled.input
index 71867880..83facff0 100644
--- a/__tests__/fixtures/workflow/all_fields_readme_filled.input
+++ b/__tests__/fixtures/workflow/all_fields_readme_filled.input
@@ -1,21 +1,21 @@
-<!-- action-docs-header action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-header source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
 ## Description
 
 Anything here
 
 
-<!-- action-docs-header action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-header source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
 
-<!-- action-docs-inputs action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
 ## Inputs
 
 Anything here
 
-<!-- action-docs-inputs action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
 
-<!-- action-docs-outputs action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-outputs source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
 ## Outputs
 
 Anything here
 
-<!-- action-docs-outputs action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-outputs source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
diff --git a/__tests__/fixtures/workflow/all_fields_readme_filled.output b/__tests__/fixtures/workflow/all_fields_readme_filled.output
index 1f4e2c41..9a26cce4 100644
--- a/__tests__/fixtures/workflow/all_fields_readme_filled.output
+++ b/__tests__/fixtures/workflow/all_fields_readme_filled.output
@@ -1,8 +1,8 @@
-<!-- action-docs-header action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-header source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
 ## A Workflow
-<!-- action-docs-header action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-header source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
 
-<!-- action-docs-inputs action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
 ### Inputs
 
 | name | description | type | required | default |
@@ -12,13 +12,13 @@
 | `inputC` | <p>A description C</p> | `string` | `true` | `C` |
 | `inputD` | <p>A description D</p> | `string` | `false` | `D` |
 | `inputE` | <p>A description E</p> | `string` | `false` | `false` |
-<!-- action-docs-inputs action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
 
-<!-- action-docs-outputs action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-outputs source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
 ### Outputs
 
 | name | description |
 | --- | --- |
 | `outputA` | <p>A description A</p> |
 | `outputB` | <p>A description B</p> |
-<!-- action-docs-outputs action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-outputs source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
diff --git a/__tests__/fixtures/workflow/all_fields_usage_readme.input b/__tests__/fixtures/workflow/all_fields_usage_readme.input
index 8147a87e..9287ae2d 100644
--- a/__tests__/fixtures/workflow/all_fields_usage_readme.input
+++ b/__tests__/fixtures/workflow/all_fields_usage_readme.input
@@ -1 +1 @@
-<!-- action-docs-usage action="__tests__/fixtures/workflow/all_fields_workflow.yml" project="npalm/action-docs" version="v1" -->
+<!-- action-docs-usage source="__tests__/fixtures/workflow/all_fields_workflow.yml" project="npalm/action-docs" version="v1" -->
diff --git a/__tests__/fixtures/workflow/all_fields_usage_readme.output b/__tests__/fixtures/workflow/all_fields_usage_readme.output
index 0675cc1b..36345839 100644
--- a/__tests__/fixtures/workflow/all_fields_usage_readme.output
+++ b/__tests__/fixtures/workflow/all_fields_usage_readme.output
@@ -1,4 +1,4 @@
-<!-- action-docs-usage action="__tests__/fixtures/workflow/all_fields_workflow.yml" project="npalm/action-docs" version="v1" -->
+<!-- action-docs-usage source="__tests__/fixtures/workflow/all_fields_workflow.yml" project="npalm/action-docs" version="v1" -->
 ### Usage
 
 ```yaml
@@ -41,4 +41,4 @@ jobs:
       # Required: false
       # Default: false
 ```
-<!-- action-docs-usage action="__tests__/fixtures/workflow/all_fields_workflow.yml" project="npalm/action-docs" version="v1" -->
+<!-- action-docs-usage source="__tests__/fixtures/workflow/all_fields_workflow.yml" project="npalm/action-docs" version="v1" -->
diff --git a/__tests__/fixtures/workflow/two_workflows_readme.input b/__tests__/fixtures/workflow/two_workflows_readme.input
index 2b614aef..44c572b9 100644
--- a/__tests__/fixtures/workflow/two_workflows_readme.input
+++ b/__tests__/fixtures/workflow/two_workflows_readme.input
@@ -1,4 +1,4 @@
-<!-- action-docs-inputs action="__tests__/fixtures/workflow/action_docs_workflow.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/workflow/action_docs_workflow.yml" -->
 ### Inputs
 
 | name | description | required | default |
@@ -7,6 +7,6 @@
 | `actionFile` | <p>The action definition file.</p> | `false` | `action.yml` |
 | `tocLevel` | <p>TOC level used for the headers.</p> | `false` | `2` |
 | `lineBreaks` | <p>Line breaks to be used in updated readme (LF|CR|CRLF).</p> | `false` | `LF` |
-<!-- action-docs-inputs action="__tests__/fixtures/workflow/action_docs_workflow.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/workflow/action_docs_workflow.yml" -->
 
-<!-- action-docs-outputs action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-outputs source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
diff --git a/__tests__/fixtures/workflow/two_workflows_readme.output b/__tests__/fixtures/workflow/two_workflows_readme.output
index ffdf257c..3cdeae22 100644
--- a/__tests__/fixtures/workflow/two_workflows_readme.output
+++ b/__tests__/fixtures/workflow/two_workflows_readme.output
@@ -1,4 +1,4 @@
-<!-- action-docs-inputs action="__tests__/fixtures/workflow/action_docs_workflow.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/workflow/action_docs_workflow.yml" -->
 ### Inputs
 
 | name | description | required | default |
@@ -7,13 +7,13 @@
 | `actionFile` | <p>The action definition file.</p> | `false` | `action.yml` |
 | `tocLevel` | <p>TOC level used for the headers.</p> | `false` | `2` |
 | `lineBreaks` | <p>Line breaks to be used in updated readme (LF|CR|CRLF).</p> | `false` | `LF` |
-<!-- action-docs-inputs action="__tests__/fixtures/workflow/action_docs_workflow.yml" -->
+<!-- action-docs-inputs source="__tests__/fixtures/workflow/action_docs_workflow.yml" -->
 
-<!-- action-docs-outputs action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-outputs source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
 ### Outputs
 
 | name | description |
 | --- | --- |
 | `outputA` | <p>A description A</p> |
 | `outputB` | <p>A description B</p> |
-<!-- action-docs-outputs action="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
+<!-- action-docs-outputs source="__tests__/fixtures/workflow/all_fields_workflow.yml" -->
diff --git a/__tests__/fixtures/workflow/workflow_usage_readme.input b/__tests__/fixtures/workflow/workflow_usage_readme.input
index 656798cf..1fb0ac07 100644
--- a/__tests__/fixtures/workflow/workflow_usage_readme.input
+++ b/__tests__/fixtures/workflow/workflow_usage_readme.input
@@ -1 +1 @@
-<!-- action-docs-usage action="__tests__/fixtures/workflow/workflow.yml" project="npalm/action-docs" version="v1" -->
+<!-- action-docs-usage source="__tests__/fixtures/workflow/workflow.yml" project="npalm/action-docs" version="v1" -->
diff --git a/__tests__/fixtures/workflow/workflow_usage_readme.output b/__tests__/fixtures/workflow/workflow_usage_readme.output
index 632d2162..e2b46d6b 100644
--- a/__tests__/fixtures/workflow/workflow_usage_readme.output
+++ b/__tests__/fixtures/workflow/workflow_usage_readme.output
@@ -1,4 +1,4 @@
-<!-- action-docs-usage action="__tests__/fixtures/workflow/workflow.yml" project="npalm/action-docs" version="v1" -->
+<!-- action-docs-usage source="__tests__/fixtures/workflow/workflow.yml" project="npalm/action-docs" version="v1" -->
 ### Usage
 
 ```yaml
@@ -26,4 +26,4 @@ jobs:
       # Required: true
       # Default: ""
 ```
-<!-- action-docs-usage action="__tests__/fixtures/workflow/workflow.yml" project="npalm/action-docs" version="v1" -->
+<!-- action-docs-usage source="__tests__/fixtures/workflow/workflow.yml" project="npalm/action-docs" version="v1" -->
diff --git a/package.json b/package.json
index 26c492e5..48c26289 100644
--- a/package.json
+++ b/package.json
@@ -19,8 +19,9 @@
     "test-cli": "nyc jest --testTimeout=10000 --silent --testMatch=**/cli*test.ts && nyc report --reporter=lcov --reporter=html --report-dir=./coverage_nyc",
     "test-action": "nyc jest --testTimeout=10000 --silent --testMatch=**/action-docs-action.test.ts --coverage=false",
     "test-workflow": "nyc jest --testTimeout=10000 --silent --testMatch=**/action-docs-workflow.test.ts --coverage=false",
-    "dev-action": "yarn run build && node lib/cli.js -a __tests__/fixtures/action/action.yml",
-    "dev-workflow": "yarn run build && node lib/cli.js -a __tests__/fixtures/workflow/workflow.yml",
+    "dev-action": "yarn run build && node lib/cli.js -s __tests__/fixtures/action/action.yml",
+    "dev-workflow": "yarn run build && node lib/cli.js -s __tests__/fixtures/workflow/workflow.yml",
+    "help": "yarn run build && node lib/cli.js --help",
     "all": "yarn run build && yarn run format && yarn run lint && yarn test"
   },
   "repository": {
diff --git a/src/action-docs.ts b/src/action-docs.ts
index 9e875064..16e30693 100644
--- a/src/action-docs.ts
+++ b/src/action-docs.ts
@@ -313,12 +313,12 @@ async function updateReadme(
     const readmeFileText = String(readFileSync(options.readmeFile, "utf-8"));
     const match = readmeFileText.match(
       new RegExp(
-        `<!-- action-docs-usage action="${escapeRegExp(actionFile)}" project="(.*)" version="(.*)" -->.?`,
+        `<!-- action-docs-usage source="${escapeRegExp(actionFile)}" project="(.*)" version="(.*)" -->.?`,
       ),
     ) as string[];
 
     if (match) {
-      const commentExpression = `<!-- action-docs-usage action="${actionFile}" project="${match[1]}" version="${match[2]}" -->`;
+      const commentExpression = `<!-- action-docs-usage source="${actionFile}" project="${match[1]}" version="${match[2]}" -->`;
       const regexp = new RegExp(
         `${escapeRegExp(commentExpression)}(?:(?:\r\n|\r|\n.*)+${escapeRegExp(commentExpression)})?`,
       );
@@ -340,7 +340,7 @@ async function updateReadme(
       });
     }
   } else {
-    const commentExpression = `<!-- action-docs-${section} action="${actionFile}" -->`;
+    const commentExpression = `<!-- action-docs-${section} source="${actionFile}" -->`;
     const regexp = new RegExp(
       `${escapeRegExp(commentExpression)}(?:(?:\r\n|\r|\n.*)+${escapeRegExp(commentExpression)})?`,
     );
diff --git a/src/cli.ts b/src/cli.ts
index 67259740..89872f8f 100644
--- a/src/cli.ts
+++ b/src/cli.ts
@@ -21,6 +21,14 @@ const args = await yargs(process.argv.slice(2))
       default: defaultOptions.actionFile,
       demandOption: false,
       alias: "a",
+      deprecated: 'use "source" instead',
+    },
+    source: {
+      description: "GitHub source file",
+      type: "string",
+      default: defaultOptions.actionFile,
+      demandOption: false,
+      alias: "s",
     },
     "no-banner": {
       description: "Print no banner",
@@ -56,7 +64,7 @@ args.banner === undefined &&
 const updateReadme = args["update-readme"] !== undefined;
 
 const options = {
-  actionFile: args.action,
+  actionFile: args.source ?? args.action,
   tocLevel: args["toc-level"],
   updateReadme,
   readmeFile: