diff --git a/r-notebook/Dockerfile b/r-notebook/Dockerfile
index 3ded3970..9b8ada5c 100644
--- a/r-notebook/Dockerfile
+++ b/r-notebook/Dockerfile
@@ -34,4 +34,4 @@ RUN conda install --yes \
     'r-nycflights13=0.1*' \
     'r-caret=6.0*' \
     'r-rcurl=1.95*' \
-    'r-randomforest=4.6*' && conda clean -yt
+    'r-randomforest=4.6*' && conda clean -tipsy