diff --git a/Dockerfile b/Dockerfile
index 02d4e1f..38b808d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,6 @@
-FROM ghcr.io/ucsd-ets/datascience-notebook:stable
+ARG BASE_CONTAINER=ucsdets/datascience-notebook:2022.1-stable
+
+FROM $BASE_CONTAINER
 
 LABEL maintainer="UC San Diego ITS/ETS <its-academictechinnovation@ucsd.edu>"
 
@@ -9,6 +11,6 @@ RUN apt-get update && \
     add-apt-repository -y universe && \
     apt-get -y install libncurses5-dev libncursesw5-dev libncurses5
 
-RUN pip install --no-cache-dir masspy==0.1.7
-
 USER jovyan
+
+RUN pip install --no-cache-dir masspy==0.1.7