diff --git a/Dockerfile b/Dockerfile
index 3ee3884..83629b4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,6 +2,7 @@ ARG LAB_IMAGE=jupyter/datascience-notebook:lab-3.4.3
 
 FROM ${LAB_IMAGE}
 RUN echo "install custom extensions"
+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