diff --git a/Dockerfile b/Dockerfile
index aa574b6..dadea22 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,8 @@ FROM library/docker:stable
 ENV HOME_DIR=/opt/crontab
 RUN apk add --no-cache --virtual .run-deps bash jq \
     && mkdir -p ${HOME_DIR}/jobs ${HOME_DIR}/projects \
-    && adduser -S docker -D
+    && adduser -S docker -D \
+    && sed -i "s/999/99/" /etc/group
 
 COPY docker-entrypoint /
 ENTRYPOINT ["/docker-entrypoint"]