diff --git a/.github/workflows/api-breakage.yml b/.github/workflows/api-breakage.yml
index 9919108..a69ed35 100644
--- a/.github/workflows/api-breakage.yml
+++ b/.github/workflows/api-breakage.yml
@@ -2,6 +2,9 @@ name: API breaking changes
 
 on:
   pull_request:
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}-apibreakage
+  cancel-in-progress: true
 
 jobs:
   linux:
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 08442a7..35ab2af 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,6 +9,9 @@ on:
     - '**.yml'
   pull_request:
   workflow_dispatch:
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}-ci
+  cancel-in-progress: true
 
 jobs:
   linux:
diff --git a/.github/workflows/validate.yml b/.github/workflows/validate.yml
index 17849a3..7cddf30 100644
--- a/.github/workflows/validate.yml
+++ b/.github/workflows/validate.yml
@@ -2,6 +2,9 @@ name: Validity Check
 
 on:
   pull_request:
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}-validate
+  cancel-in-progress: true
 
 jobs:
   validate: