diff --git a/Dockerfile b/Dockerfile
index cb0986f..612f694 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,8 +3,8 @@ FROM $BASE_CONTAINER
 
 USER root
 
-RUN pip install coverage==5.5
-RUN pip install 'pandas>=0.24' babypandas==0.1.7 pandas-tutor==2.0.3
-RUN pip install otter-grader==3.3.0
+RUN pip install coverage==5.5 && \
+  pip install 'pandas>=0.24' babypandas==0.1.7 pandas-tutor==2.0.3 && \
+  pip install otter-grader==3.3.0
 
 USER $NB_UID