diff --git a/Dockerfile b/Dockerfile
index 80be55a..fa899e9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,9 +2,9 @@ ARG LAB_IMAGE=jupyter/datascience-notebook:lab-3.4.7
 
 FROM ${LAB_IMAGE}
 RUN echo "install custom extensions"
-RUN python3 -m pip install --upgrade pip setuptools wheel
+#RUN python3 -m pip install --upgrade pip setuptools wheel
 RUN pip install --extra-index-url https://git.sandbox.iuk.hdm-stuttgart.de/api/packages/grosse/pypi/simple jupyterlab-sandbox-theme
 #RUN pip install --extra-index-url https://git.sandbox.iuk.hdm-stuttgart.de/api/packages/grosse/pypi/simple jupyterlab-data-pool
-RUN pip install --extra-index-url https://git.sandbox.iuk.hdm-stuttgart.de/api/packages/grosse/pypi/simple jupyterlab-training
-RUN pip install --extra-index-url https://git.sandbox.iuk.hdm-stuttgart.de/api/packages/grosse/pypi/simple jupyterlab-synthetic-data
+#RUN pip install --extra-index-url https://git.sandbox.iuk.hdm-stuttgart.de/api/packages/grosse/pypi/simple jupyterlab-training
+#RUN pip install --extra-index-url https://git.sandbox.iuk.hdm-stuttgart.de/api/packages/grosse/pypi/simple jupyterlab-synthetic-data
 RUN pip install ipywebrtc opencv-python-headless jupyterlab-git