diff --git a/.gitea/workflows/build.yml b/.gitea/workflows/build.yml
index 84c1267..5d48624 100644
--- a/.gitea/workflows/build.yml
+++ b/.gitea/workflows/build.yml
@@ -118,7 +118,7 @@ jobs:
           # Hier nutzen wir das korrekte Flag für Cosign v2
           cosign sign -y \
             --key env://COSIGN_PRIVATE_KEY \
-            --registry-referrers-mode=oci-1.1 \
+            --registry-referrers-mode=oci-1-1 \
             "humocs-man.duckdns.org/humocs-man/fluffy-pancake@${DIGEST}"
         env:
           COSIGN_PRIVATE_KEY: ${{ secrets.SIGNING_SECRET }}