diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2f54d2838cf..fa01f37b1b8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -30,6 +30,9 @@ permissions:
 defaults:
   run:
     shell: bash
+concurrency:
+  group: "${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}"
+  cancel-in-progress: true
 jobs:
   pr:
     permissions:
diff --git a/src/ci/github-actions/ci.yml b/src/ci/github-actions/ci.yml
index a9e42e4a0a0..87a10a5e87b 100644
--- a/src/ci/github-actions/ci.yml
+++ b/src/ci/github-actions/ci.yml
@@ -305,6 +305,10 @@ defaults:
     # shell is PowerShell.)
     shell: bash
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   pr:
     permissions: