diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 701492e..d6f033b 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -5,7 +5,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Fetch repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
     - name: Install Pandoc
       run:  sudo apt-get install -yy pandoc
     - name: Set up Ruby
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index 0586f94..12e2477 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Fetch repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
       with:
         fetch-depth: 0
     - name: Configure git