diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ec2163c..64fe70b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,7 @@ jobs:
       COMMIT_AUTHOR_EMAIL: dev@optimade.org
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Set up Python 3.8
       uses: actions/setup-python@v4
diff --git a/.github/workflows/github-pages.yml b/.github/workflows/github-pages.yml
index 667f76e..a9e8d45 100644
--- a/.github/workflows/github-pages.yml
+++ b/.github/workflows/github-pages.yml
@@ -14,7 +14,7 @@ jobs:
       COMMIT_AUTHOR_EMAIL: dev@optimade.org
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Set up Python 3.8
       uses: actions/setup-python@v4