diff --git a/src/Dockerfile b/src/Dockerfile
index 83a1ce67..01146081 100644
--- a/src/Dockerfile
+++ b/src/Dockerfile
@@ -3,3 +3,7 @@ FROM renovate/renovate:19.219.11-slim
 COPY entrypoint.sh /usr/entrypoint.sh
 
 ENTRYPOINT ["/usr/entrypoint.sh"]
+
+RUN set -ex; whoami; groups
+
+USER root