diff --git a/.forgejo/workflows/deploy.yaml b/.forgejo/workflows/deploy.yaml
index 50e3e16..b258e45 100644
--- a/.forgejo/workflows/deploy.yaml
+++ b/.forgejo/workflows/deploy.yaml
@@ -55,6 +55,7 @@ jobs:
         id: get-version
         run: |
           TAG=$(awk '/<version>/ {count++; if(count == 2) print $0}' pom.xml | sed -n 's|.*<version>\([^<]*\)</version>.*|\1|p')
+          TAG=$(echo "$TAG" | tr '[:upper:]' '[:lower:]')
           echo "tag=$TAG" >> "$GITHUB_OUTPUT"
       - name: Build and push
         uses: docker/build-push-action@v6