diff --git a/.gitea/workflows/release.yml b/.gitea/workflows/release.yml
index 222c6e6..539239c 100644
--- a/.gitea/workflows/release.yml
+++ b/.gitea/workflows/release.yml
@@ -59,7 +59,7 @@ jobs:
         registry: git.disi.dev
     - name: Build and publish
       run: |
-        REPOSITORY_OWNER=$(echo "$GITHUB_REPOSITORY" | awk -F '/' '{print $1}')
+        REPOSITORY_OWNER=$(echo "$GITHUB_REPOSITORY" | awk -F '/' '{print $1}' | tr '[:upper:]' '[:lower:]')
         REPOSITORY_NAME=$(echo "$GITHUB_REPOSITORY" | awk -F '/' '{print $2}' | tr '-' '_')
         docker build -t "git.disi.dev/$REPOSITORY_OWNER/song-of-the-day:$(cat $REPOSITORY_NAME/VERSION)" ./song_of_the_day
         docker push "git.disi.dev/$REPOSITORY_OWNER/song-of-the-day:$(cat $REPOSITORY_NAME/VERSION)"