diff --git a/Dockerfile b/Dockerfile
index f018af1..e90336f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,10 +9,11 @@ FROM ${LAB_IMAGE}
 #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
+#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
 #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 ipywebrtc==0.6.0 opencv-python-headless==4.9.0.80 voila==0.5.5
+RUN pip install ipywebrtc==0.6.0 
+#opencv-python-headless==4.9.0.80 voila==0.5.5
 RUN jupyter labextension disable "@jupyterlab/apputils-extension:announcements"
\ No newline at end of file