diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index d449f93..bb37155 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -17,6 +17,8 @@ jobs:
       max-parallel: 1 # Ensures unidock_tools is built after unidock
 
     steps:
+      - name: Checkout
+        uses: actions/checkout@v4
       - name: Docker meta
         id: meta
         uses: docker/metadata-action@v5