diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8fc71eb..4463bff 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,6 +7,10 @@ on:
     branches: [main, "pr/gh-*"]
   workflow_dispatch:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
 permissions:
   contents: read
 
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 2a87daf..c5d5e7a 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -9,6 +9,10 @@ on:
     # Weekly Monday 06:17 UTC — off-peak, off-the-hour to avoid runner contention.
     - cron: "17 6 * * 1"
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
 permissions:
   contents: read
 
diff --git a/.github/workflows/dependency-review.yml b/.github/workflows/dependency-review.yml
index 59706d4..4b649b2 100644
--- a/.github/workflows/dependency-review.yml
+++ b/.github/workflows/dependency-review.yml
@@ -4,6 +4,10 @@ on:
   pull_request:
     branches: [main]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
 permissions:
   contents: read
 
diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 5a97dc9..bc1c072 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -30,6 +30,10 @@ on:
         required: true
         type: string
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
 permissions:
   contents: read
   packages: write
diff --git a/.github/workflows/publish-test.yml b/.github/workflows/publish-test.yml
index e5380c8..576a28b 100644
--- a/.github/workflows/publish-test.yml
+++ b/.github/workflows/publish-test.yml
@@ -21,6 +21,10 @@ on:
   push:
     branches: [main]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
 jobs:
   publish-dev:
     runs-on: ubuntu-latest