diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0cbcc8780d..5466f8ba41 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,7 +6,7 @@ on:
       - '*'
   push:
     branches:
-      - master
+      - main
       - opendistro-*
 
 jobs:
diff --git a/.github/workflows/release-drafter.yml b/.github/workflows/release-drafter.yml
index 5b3b138dcb..bf6e5b0674 100644
--- a/.github/workflows/release-drafter.yml
+++ b/.github/workflows/release-drafter.yml
@@ -2,13 +2,13 @@ name: Release-drafter
 
 on:
   push:
-    branches: [master]
+    branches: [main]
 
 jobs:
   update_release_draft:
     runs-on: ubuntu-latest
     steps:
-      # Drafts the next Release notes as Pull Requests are merged into "master"
+      # Drafts the next Release notes as Pull Requests are merged into "main"
       - uses: release-drafter/release-drafter@v5
         with:
           config-name: release-notes-drafter-config.yml
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index d37b4f047d..c1119853fd 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -22,7 +22,7 @@ When filing an issue, please check [existing open](../../issues), or [recently c
 ## Contributing via Pull Requests
 Contributions via pull requests are much appreciated. Before sending us a pull request, please ensure that:
 
-1. You are working against the latest source on the *master* branch.
+1. You are working against the latest source on the *main* branch.
 2. You check existing open, and recently merged, pull requests to make sure someone else hasn't addressed the problem already.
 3. You open an issue to discuss any significant work - we would hate for your time to be wasted.
 
diff --git a/README.md b/README.md
index 5124642493..34db3ecb4a 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
-[![CI](https://github.com/opendistro-for-elasticsearch/security/workflows/CI/badge.svg?branch=master)](https://github.com/opendistro-for-elasticsearch/security/actions)
-[![codecov](https://codecov.io/gh/opendistro-for-elasticsearch/security/branch/master/graph/badge.svg)](https://codecov.io/gh/opendistro-for-elasticsearch/security)
+[![CI](https://github.com/opendistro-for-elasticsearch/security/workflows/CI/badge.svg?branch=main)](https://github.com/opendistro-for-elasticsearch/security/actions)
+[![codecov](https://codecov.io/gh/opendistro-for-elasticsearch/security/branch/main/graph/badge.svg)](https://codecov.io/gh/opendistro-for-elasticsearch/security)
 
 # Open Distro for Elasticsearch Security