diff --git a/.github/workflows/deploy-docs.yml b/.github/workflows/deploy-docs.yml
index 200fc9e..58cd91e 100644
--- a/.github/workflows/deploy-docs.yml
+++ b/.github/workflows/deploy-docs.yml
@@ -15,7 +15,7 @@ jobs:
 
     steps:
     - name: checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         fetch-depth: 0
 
diff --git a/.github/workflows/pypi.yml b/.github/workflows/pypi.yml
index 69113a0..ff267a2 100644
--- a/.github/workflows/pypi.yml
+++ b/.github/workflows/pypi.yml
@@ -13,7 +13,7 @@ jobs:
   packages:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Set up Python
       uses: actions/setup-python@v4
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index c320297..43a06cf 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -15,7 +15,7 @@ jobs:
       fail-fast: false
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0