diff --git a/.github/workflows/docker_image.yml b/.github/workflows/docker_image.yml
index e07a391..86ef648 100644
--- a/.github/workflows/docker_image.yml
+++ b/.github/workflows/docker_image.yml
@@ -23,7 +23,7 @@ jobs:
           egress-policy: audit
 
       - name: Checkout
-        uses: actions/checkout@v7
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
       - name: Validate tag format
         run: |
           TAG=${{ github.event.inputs.release_tag }}