diff --git a/.github/workflows/cleanup.yml b/.github/workflows/cleanup.yml
index 919d685a..bb6bcc89 100644
--- a/.github/workflows/cleanup.yml
+++ b/.github/workflows/cleanup.yml
@@ -21,4 +21,6 @@ jobs:
         env:
           KUBE_CONFIG_FILE: ${{ secrets.KUBE_CONFIG_FILE }}
         with:
-          namespace: workadventure-${{ env.GITHUB_REF_SLUG }}
+# FIXME: we are not using ${{ env.GITHUB_REF_SLUG }} that resolves to master BUT! we are not using a slugified namespace
+# so complex namespace names will not be treated correctly
+          namespace: workadventure-${{ github.event.ref }}