diff --git a/charts/atlantis/Chart.yaml b/charts/atlantis/Chart.yaml
index b2ce180c..b57d1104 100644
--- a/charts/atlantis/Chart.yaml
+++ b/charts/atlantis/Chart.yaml
@@ -3,7 +3,7 @@ apiVersion: v1
 appVersion: v0.28.3
 description: A Helm chart for Atlantis https://www.runatlantis.io
 name: atlantis
-version: 5.3.0
+version: 5.4.0
 keywords:
   - terraform
 home: https://www.runatlantis.io
diff --git a/charts/atlantis/README.md b/charts/atlantis/README.md
index a2384cd2..28ec57d7 100644
--- a/charts/atlantis/README.md
+++ b/charts/atlantis/README.md
@@ -112,7 +112,7 @@ extraManifests:
 | gitconfig | string | `""` | When referencing Terraform modules in private repositories, it may be helpful (necessary?) to use redirection in a .gitconfig. Check values.yaml for examples. |
 | gitconfigSecretName | string | `""` | If managing secrets outside the chart for the gitconfig, use this variable to reference the secret name |
 | github | object | `{}` | If using GitHub, please enter your values as follows. The chart will perform the base64 encoding for values that are stored in secrets. The 'hostname' key is exclusive to GitHub Enterprise installations. Check values.yaml for examples. |
-| githubApp | object | `{}` | If using a GitHub App, please enter your values as follows. The chart will perform the base64 encoding for you for values that are stored in secrets. Check values.yaml for examples. |
+| githubApp | object | `{}` | If using a GitHub App, please enter your values as follows. The chart will perform the base64 encoding for you for values that are stored in secrets. installationId is necessary when there are multiple installs of the Github App. Check values.yaml for examples. |
 | gitlab | object | `{}` | If using GitLab, please enter your values as follows. The 'hostname' key is exclusive to GitLab Enterprise installations. The chart will perform the base64 encoding for you for values that are stored in secrets. Check values.yaml for examples. |
 | googleServiceAccountSecrets | list | `[]` | Optionally specify google service account credentials as Kubernetes secrets. If you are using the terraform google provider you can specify the credentials as "${file("/var/secrets/some-secret-name/key.json")}". Check values.yaml for examples. |
 | hidePrevPlanComments | bool | `false` | Enables atlantis to hide previous plan comments. |
@@ -404,4 +404,4 @@ make unit-test-run-atlantis
 ```
 
 ----------------------------------------------
-Autogenerated from chart metadata using [helm-docs v1.13.1](https://github.com/norwoodj/helm-docs/releases/v1.13.1)
+Autogenerated from chart metadata using [helm-docs v1.14.0](https://github.com/norwoodj/helm-docs/releases/v1.14.0)
diff --git a/charts/atlantis/values.schema.json b/charts/atlantis/values.schema.json
index 2403a5d1..1ab2d1ba 100644
--- a/charts/atlantis/values.schema.json
+++ b/charts/atlantis/values.schema.json
@@ -91,6 +91,13 @@
           ],
           "description": "GitHub app ID. If set, GitHub authentication will be performed as an [installation](https://developer.github.com/v3/apps/installations/)."
         },
+        "installationId": {
+          "type": [
+            "integer",
+            "string"
+          ],
+          "description": "GitHub app installationId. If set, GitHub authentication will be performed as an [installation](https://developer.github.com/v3/apps/installations/)."
+        },
         "slug": {
           "type": "string",
           "description": "A slugged version of GitHub app name shown in pull requests comments, etc (not Atlantis App but something like atlantis-app). Atlantis uses the value of this parameter to identify the comments it has left on GitHub pull requests. This is used for functions such as `hidePrevPlanComments`."