diff --git a/.github/workflows/mkdoc-gh-pages.yaml b/.github/workflows/mkdoc-gh-pages.yaml
index 5cb7451..e41e5a0 100644
--- a/.github/workflows/mkdoc-gh-pages.yaml
+++ b/.github/workflows/mkdoc-gh-pages.yaml
@@ -8,7 +8,7 @@ jobs:
     name: Deploy docs
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up Python 3.8
         uses: actions/setup-python@v4
         with:
diff --git a/.github/workflows/python-package.yaml b/.github/workflows/python-package.yaml
index c87751c..45ceaa0 100644
--- a/.github/workflows/python-package.yaml
+++ b/.github/workflows/python-package.yaml
@@ -17,7 +17,7 @@ jobs:
         python-version: ["3.8", "3.9"]
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/cache@v3
         id: cache
         with:
diff --git a/.github/workflows/python-publish.yaml b/.github/workflows/python-publish.yaml
index 7273c22..323c0f2 100644
--- a/.github/workflows/python-publish.yaml
+++ b/.github/workflows/python-publish.yaml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up Python
         uses: actions/setup-python@v4
         with: