diff --git a/.github/workflows/release-docker.yml b/.github/workflows/release-docker.yml
index e9c5a5013..53fe9a6f3 100644
--- a/.github/workflows/release-docker.yml
+++ b/.github/workflows/release-docker.yml
@@ -29,4 +29,4 @@ jobs:
           push: true
           tags: ghcr.io/go-vikunja/vikunja:unstable
           build-args: |
-            RELEASE_VERSION:${{ steps.ghd.outputs.describe }}
+            RELEASE_VERSION=${{ steps.ghd.outputs.describe }}