diff --git a/.gitea/workflows/build.yaml b/.gitea/workflows/build.yaml
index f1221a5..8e6fc1b 100644
--- a/.gitea/workflows/build.yaml
+++ b/.gitea/workflows/build.yaml
@@ -23,7 +23,7 @@ jobs:
             echo "TAG=$PREFIX:$VERSION" >> $GITHUB_OUTPUT
             echo "LATEST=true" >> $GITHUB_OUTPUT
           else
-            echo "VERSION=alpha.${{ github.run_id }}" >> $GITHUB_OUTPUT
+            echo "VERSION=alpha-${{ github.run_id }}" >> $GITHUB_OUTPUT
             if [ ${{ github.event_name }} = "workflow_dispatch" ]; then
               echo "Manual run detected, also updating 'latest' tag."
               echo "LATEST=true" >> $GITHUB_OUTPUT