diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 07ce5e1..a142e99 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,6 +8,11 @@ on:
 permissions:
   contents: read
 
+concurrency:
+  # yamllint disable-line rule:line-length
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   ci:
     name: ${{ matrix.name }}
diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 44a1f45..de56f9f 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -13,6 +13,11 @@ permissions:
   contents: read
   packages: write
 
+concurrency:
+  # yamllint disable-line rule:line-length
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   build-image:
     runs-on: ubuntu-latest