diff --git a/r-notebook/Dockerfile b/r-notebook/Dockerfile
index 5425882a..8b9eeec2 100644
--- a/r-notebook/Dockerfile
+++ b/r-notebook/Dockerfile
@@ -34,6 +34,8 @@ RUN conda install --quiet --yes \
     'r-rcurl=1.95*' \
     'r-crayon=1.3*' \
     'r-randomforest=4.6*' \
+    'r-htmltools=0.3*' \
+    'r-htmlwidgets=0.9*' \
     'r-hexbin=1.27*' && \
     conda clean -tipsy && \
     fix-permissions $CONDA_DIR