diff --git a/Dockerfile b/Dockerfile
index e736b97..afc1e12 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,8 +3,7 @@ FROM jupyter/scipy-notebook
 LABEL Maintainer="Wolfgang Hottgenroth <wolfgang.hottgenroth@icloud.com>"
 LABEL ImageName="registry.gitlab.com/wolutator/registry.gitlab.com/wolutator/"
 
-ARG GATEWAY_URL
-ENV E_GATEWAY_URL ${GATEWAY_URL}
+ENV GATEWAY_URL ""
 
 RUN \
   pip install influxdb && \
@@ -12,5 +11,5 @@ RUN \
   fix-permissions $CONDA_DIR && \
   fix-permissions /home/$NB_USER 
 
-CMD start-notebook.sh --NotebookApp.token='' --NotebookApp.base_url=$E_GATEWAY_URL
+CMD start-notebook.sh --NotebookApp.token='' --NotebookApp.base_url=$GATEWAY_URL