diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index a155edc..7624696 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -56,5 +56,5 @@ build:
         buildah tag $FULL_IMAGE_NAME:${TAGS} $FULL_IMAGE_NAME:${TAG}
       done
     - buildah push --all $FULL_IMAGE_NAME
-    - DIGEST=$(buildah images --format '{{.Digest}}' $FULL_IMAGE_NAME:$TAGS | head -n 1)
+    - DIGEST=($(buildah images --format '{{.Digest}}' $FULL_IMAGE_NAME:$TAGS))
     - cosign sign -y --key $SIGNING_SECRET $FULL_IMAGE_NAME@$DIGEST
\ No newline at end of file