diff --git a/.gitea/workflows/build.yml b/.gitea/workflows/build.yml
index 70419bd..91d0fff 100644
--- a/.gitea/workflows/build.yml
+++ b/.gitea/workflows/build.yml
@@ -107,12 +107,16 @@ jobs:
         if: github.event_name != 'pull_request'
         uses: sigstore/cosign-installer@v4.1.2
 
+      - name: Install skopeo
+        run: sudo apt-get update && sudo apt-get install -y skopeo
+
       - name: Sign container image
         if: github.event_name != 'pull_request' && env.IS_TEST_BUILD == 'false'
         run: |
+          DIGEST=$(skopeo inspect docker://humocs-man.duckdns.org/humocs-man/fluffy-pancake:stable --format '{{.Digest}}')
           cosign sign -y \
             --key env://COSIGN_PRIVATE_KEY \
-            humocs-man.duckdns.org/humocs-man/fluffy-pancake:stable
+            "humocs-man.duckdns.org/humocs-man/fluffy-pancake@${DIGEST}"
         env:
           COSIGN_PRIVATE_KEY: ${{ secrets.SIGNING_SECRET }}
           COSIGN_PASSWORD: ""