diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d3cd47f1..4e3fdc1a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -28,6 +28,10 @@ on:
       - go.mod
       - go.sum
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   verify:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/markdown.yml b/.github/workflows/markdown.yml
index c735e81a..05b86281 100644
--- a/.github/workflows/markdown.yml
+++ b/.github/workflows/markdown.yml
@@ -11,6 +11,10 @@ on:
       - "**.md"
       - .github/workflows/markdown.yml
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   markdown:
     runs-on: ubuntu-latest