diff --git a/.github/workflows/clang-format.yml b/.github/workflows/clang-format.yml
index 64d8a50..ed037b6 100644
--- a/.github/workflows/clang-format.yml
+++ b/.github/workflows/clang-format.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Run clang-format
       uses: HorstBaerbel/action-clang-format@1.4
 
diff --git a/.github/workflows/ns3-build.yml b/.github/workflows/ns3-build.yml
index d150ed8..e9c41f3 100644
--- a/.github/workflows/ns3-build.yml
+++ b/.github/workflows/ns3-build.yml
@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: ns3 build
       uses: marshallasch/ns3-action@32.3
       with: