diff --git a/pyspark-notebook/Dockerfile b/pyspark-notebook/Dockerfile
index 71fed93b..91ddb877 100644
--- a/pyspark-notebook/Dockerfile
+++ b/pyspark-notebook/Dockerfile
@@ -43,5 +43,6 @@ USER $NB_UID
 
 # Install pyarrow
 RUN conda install --quiet -y 'pyarrow' && \
+    conda clean -tipsy && \
     fix-permissions $CONDA_DIR && \
     fix-permissions /home/$NB_USER