diff --git a/.gitea/workflows/website.yaml b/.gitea/workflows/website.yaml
index 0b235d8..0956dc7 100644
--- a/.gitea/workflows/website.yaml
+++ b/.gitea/workflows/website.yaml
@@ -19,8 +19,7 @@ jobs:
           REGISTRY="$(sed 's .*://  ' <<< ${{ gitea.server_url }})"
           cat <<EOF >> .env
           BASE_URL="$BASE_URL"
-          REGISTRY="$REGISTRY"
-          IMAGEAPP="$REGISTRY/${{ gitea.repository }}:${{ gitea.ref_name }}"
+          IMAGEAPP="$REGISTRY/$(printf '%s' "${{ gitea.repository }}:${{ gitea.ref_name }}" | tr '[:upper:]' '[:lower:]' | tr -c '[:lower:][:digit:]-/:_' _)"
           EOF
           cat .env