diff --git a/.github/workflows/post-merge.yml b/.github/workflows/post-merge.yml
index 2a5218f4..f14f5db5 100644
--- a/.github/workflows/post-merge.yml
+++ b/.github/workflows/post-merge.yml
@@ -13,7 +13,7 @@ jobs:
       contents: write
     steps:
       - name: Checkout
-        uses: actions/checkout@v4.1.1
+        uses: actions/checkout@v4.1.3
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: Configure git user
@@ -56,7 +56,7 @@ jobs:
           git config --global user.name 'Lamassu Serialization Version Bot'
           git config --global user.email 'lamassu-serialization-version-bot@entur.org'
       - name: Checkout
-        uses: actions/checkout@v4.1.1
+        uses: actions/checkout@v4.1.3
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: Bump serialization version