diff --git a/.github/workflows/apple.yml b/.github/workflows/apple.yml
index 37f2b365..a04d9f74 100644
--- a/.github/workflows/apple.yml
+++ b/.github/workflows/apple.yml
@@ -6,6 +6,11 @@ on:
   pull_request:
   schedule:
     - cron: '13 11 * * *'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref_name }}-${{ github.event.pull_request.number || github.sha }}
+  cancel-in-progress: true
+
 jobs:
   pythonbuild:
     runs-on: 'macos-13'
diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index f0bc359b..b16aa9b9 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -1,10 +1,13 @@
-
 name: Check
 
 on:
   push:
   pull_request:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref_name }}-${{ github.event.pull_request.number || github.sha }}
+  cancel-in-progress: true
+
 jobs:
   check:
     runs-on: "ubuntu-latest"
diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 41a6f36e..3962fa3e 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -6,6 +6,11 @@ on:
   pull_request:
   schedule:
     - cron: '13 11 * * *'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref_name }}-${{ github.event.pull_request.number || github.sha }}
+  cancel-in-progress: true
+
 jobs:
   pythonbuild:
     runs-on: ubuntu-22.04
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 38679183..7e317a13 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -6,6 +6,11 @@ on:
   pull_request:
   schedule:
     - cron: '13 11 * * *'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref_name }}-${{ github.event.pull_request.number || github.sha }}
+  cancel-in-progress: true
+
 jobs:
   pythonbuild:
     runs-on: 'windows-2019'