diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ce25684047..31d4128327 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -4,10 +4,13 @@ on:
   push:
     branches:
       - main
-      - 1.*
       - 2.*
   pull_request:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}
+
 env:
   GRADLE_OPTS: -Dhttp.keepAlive=false
   CI_ENVIRONMENT: normal
diff --git a/.github/workflows/plugin_install.yml b/.github/workflows/plugin_install.yml
index 537f8033fb..3f87a00372 100644
--- a/.github/workflows/plugin_install.yml
+++ b/.github/workflows/plugin_install.yml
@@ -2,6 +2,10 @@ name: Plugin Install
 
 on: [push, pull_request, workflow_dispatch]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}
+
 env:
   OPENSEARCH_VERSION: 3.6.0
   PLUGIN_NAME: opensearch-security