diff --git a/Dockerfile b/Dockerfile
index f2acbd2..74a30c2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 # sudo docker kill $(sudo docker ps -q);  sudo docker rm $(sudo docker ps -a -q); sudo docker rmi $(sudo docker images -q)
 # sudo docker build --squash --no-cache -t 032401129069.dkr.ecr.ca-central-1.amazonaws.com/jupyterhub:jupyterlab-open .
 
-ARG BASE_CONTAINER=quay.io/jupyter/datascience-notebook:hub-5.2.1
+ARG BASE_CONTAINER=quay.io/jupyter/datascience-notebook:hub-5.2.0
 #ARG BASE_CONTAINER=032401129069.dkr.ecr.ca-central-1.amazonaws.com/jupyterhub:jupyterlab-all
 FROM $BASE_CONTAINER
 
@@ -50,6 +50,7 @@ RUN mamba create --yes -n sage sage=10.4 python=3.11 && \
     "openjdk" \
     "maven" \
     "ipython-sql" \
+    "jupyterhub-singleuser" \
     "jupyterlab-lsp" \
     "jupyter-lsp-python" \
     "jupyter_bokeh"