diff --git a/.github/workflows/c-cpp.yml b/.github/workflows/c-cpp.yml
index aed9f393..9f42070b 100644
--- a/.github/workflows/c-cpp.yml
+++ b/.github/workflows/c-cpp.yml
@@ -21,6 +21,6 @@ jobs:
         curl -L -O -C - https://sourceforge.net/projects/sdcc/files/sdcc-linux-amd64/4.3.0/sdcc-4.3.0-amd64-unknown-linux2.5.tar.bz2
         tar -C "$HOME" -xjf sdcc-4.3.0-amd64-unknown-linux2.5.tar.bz2
         echo "$HOME/sdcc-4.3.0/bin" >> $GITHUB_PATH
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: make
       run: make
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index c96fab58..dfe16f5b 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -48,7 +48,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
diff --git a/.github/workflows/flawfinder.yml b/.github/workflows/flawfinder.yml
index 70e85292..d8447f79 100644
--- a/.github/workflows/flawfinder.yml
+++ b/.github/workflows/flawfinder.yml
@@ -24,7 +24,7 @@ jobs:
       security-events: write
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: flawfinder_scan
         uses: david-a-wheeler/flawfinder@c57197cd6061453f10a496f30a732bc1905918d1
diff --git a/.github/workflows/gh-pages.yml b/.github/workflows/gh-pages.yml
index a1d3c41f..a2541540 100644
--- a/.github/workflows/gh-pages.yml
+++ b/.github/workflows/gh-pages.yml
@@ -13,7 +13,7 @@ jobs:
     concurrency:
       group: ${{ github.workflow }}-${{ github.ref }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           submodules: 'true'