diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 2b8ce51..674f843 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -7,7 +7,7 @@ jobs:
   main:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
     - run: docker login --username "$DOCKER_USER" --password "$DOCKER_PASS" ghcr.io
       env:
         DOCKER_USER: ${{ github.actor }}