diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1966210..7053e4d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,7 @@ jobs:
     - run: ls -l /proc/self/fd
 
 # Build and test in Ubuntu VM provided by Github CI
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v6
       with:
         fetch-depth: 0 # Make "git describe" work
     - run: sudo apt-get install -qq pandoc cppcheck
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index a014cc8..d405a83 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -38,7 +38,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v6
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL