diff --git a/.github/workflows/docker-image.yml b/.github/workflows/docker-image.yml
index e41a848..9f0933c 100644
--- a/.github/workflows/docker-image.yml
+++ b/.github/workflows/docker-image.yml
@@ -36,7 +36,7 @@ jobs:
           echo "IMAGE_NAME=${GITHUB_REPOSITORY,,}" >> ${GITHUB_ENV}
           
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
 
       - name: Set up QEMU
         uses: docker/setup-qemu-action@68827325e0b33c7199eb31dd4e31fbe9023e06e3 # v3.0.0
@@ -110,7 +110,7 @@ jobs:
             echo "IMAGE_NAME=${GITHUB_REPOSITORY,,}" >> ${GITHUB_ENV}
         
         - name: Checkout repository
-          uses: actions/checkout@v3
+          uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
 
         # inspired by https://github.com/reloc8/action-latest-release-version
         - name: Get release version