diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 8292c64f..26f637ec 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -8,6 +8,10 @@ on:
   schedule:
     - cron: "53 16 * * 5"
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   analyze:
     name: Analyze
diff --git a/.github/workflows/sphinx.yml b/.github/workflows/sphinx.yml
index 72578c30..51db8dee 100644
--- a/.github/workflows/sphinx.yml
+++ b/.github/workflows/sphinx.yml
@@ -8,6 +8,10 @@ on:
     branches:
       - main
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   sphinx:
 
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index bafc4117..54f08a59 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -8,6 +8,10 @@ on:
     branches:
       - "*"
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 defaults:
   run:
     shell: bash -l {0}