diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index a825af2..09af659 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -6,7 +6,11 @@ on:
   pull_request:
   workflow_dispatch:
 
-jobs:
+concurrency:
+  group: '${{ github.workflow }}-${{ github.job }}-${{ github.head_ref || github.ref_name }}'
+  cancel-in-progress: true
+
+  jobs:
   test-sinatra:
     runs-on: ubuntu-latest
     strategy:
diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index 00c69db..316dc2b 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -6,7 +6,11 @@ on:
   pull_request:
   workflow_dispatch:
 
-jobs:
+concurrency:
+  group: '${{ github.workflow }}-${{ github.job }}-${{ github.head_ref || github.ref_name }}'
+  cancel-in-progress: true
+
+  jobs:
   test-sinatra:
     runs-on: ${{ matrix.os }}
     strategy: