diff --git a/.github/workflows/ci-dotnet.yaml b/.github/workflows/ci-dotnet.yaml
index ce88647..8d735bd 100644
--- a/.github/workflows/ci-dotnet.yaml
+++ b/.github/workflows/ci-dotnet.yaml
@@ -24,6 +24,9 @@ jobs:
   ci:
     runs-on: ubuntu-latest
     timeout-minutes: 20
+    concurrency:
+      group: ci-${{ github.workflow }}-${{ github.ref }}
+      cancel-in-progress: true
     defaults:
       run:
         working-directory: ${{ inputs.working-directory }}
diff --git a/.github/workflows/ci-python-sam.yaml b/.github/workflows/ci-python-sam.yaml
index 85c6cfb..dd1f5d9 100644
--- a/.github/workflows/ci-python-sam.yaml
+++ b/.github/workflows/ci-python-sam.yaml
@@ -48,6 +48,9 @@ jobs:
   ci:
     runs-on: ubuntu-latest
     timeout-minutes: 10
+    concurrency:
+      group: ci-${{ github.workflow }}-${{ github.ref }}
+      cancel-in-progress: true
     steps:
       - uses: actions/checkout@v6
 
diff --git a/.github/workflows/ci-typescript-cdk.yaml b/.github/workflows/ci-typescript-cdk.yaml
index ac7e9a7..f3ac699 100644
--- a/.github/workflows/ci-typescript-cdk.yaml
+++ b/.github/workflows/ci-typescript-cdk.yaml
@@ -60,6 +60,9 @@ jobs:
   ci:
     runs-on: ubuntu-latest
     timeout-minutes: 30
+    concurrency:
+      group: ci-${{ github.workflow }}-${{ github.ref }}
+      cancel-in-progress: true
     steps:
       - uses: actions/checkout@v6