diff --git a/.github/workflows/ci-master-scheduled.yml b/.github/workflows/ci-master-scheduled.yml
index a94e31c7..f3b2247d 100644
--- a/.github/workflows/ci-master-scheduled.yml
+++ b/.github/workflows/ci-master-scheduled.yml
@@ -20,7 +20,7 @@ jobs:
           - "3.11"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: actions/setup-python@v4
         with:
diff --git a/.github/workflows/ci-pull-request.yml b/.github/workflows/ci-pull-request.yml
index 1e42804c..96823f89 100644
--- a/.github/workflows/ci-pull-request.yml
+++ b/.github/workflows/ci-pull-request.yml
@@ -22,7 +22,7 @@ jobs:
           - "3.11"
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - uses: actions/setup-python@v4
       with:
@@ -62,7 +62,7 @@ jobs:
   test-release:
     runs-on: ubuntu-latest
     steps:  
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index ea21158f..ae4544c3 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -30,7 +30,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         # We must fetch at least the immediate parents so that if this is
         # a pull request then we can checkout the head.
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index a8e18961..361be321 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -12,7 +12,7 @@ jobs:
       upload_url: ${{ steps.create_release.outputs.upload_url }}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
@@ -45,7 +45,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Set up Python
         uses: actions/setup-python@v4