diff --git a/Dockerfile b/Dockerfile
index 782939b..793ffad 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,10 +4,10 @@ ARG LAB_IMAGE=quay.io/jupyter/scipy-notebook:lab-4.0.12
 # ARG NB_GID="100"
 FROM ${LAB_IMAGE}
 # kaniko issue https://github.com/GoogleContainerTools/kaniko/issues/1087
-# SHELL ["/bin/bash", "-o", "pipefail", "-c"]
-# USER root
-# RUN apt-get update --yes 
-# USER ${NB_UID}
+SHELL ["/bin/bash", "-o", "pipefail", "-c"]
+USER root
+RUN apt-get update --yes 
+USER ${NB_UID}
 RUN echo "install custom extensions "
 RUN pip install --extra-index-url https://git.sandbox.iuk.hdm-stuttgart.de/api/packages/grosse/pypi/simple jupyterlab-sandbox-theme==0.1.4
 RUN pip install --extra-index-url https://git.sandbox.iuk.hdm-stuttgart.de/api/packages/grosse/pypi/simple jupyterlab-sandbox-announcement==0.1.3