diff --git a/testing/install_external_dependencies.sh b/testing/install_external_dependencies.sh
index daa670bc7dd..e34296e3ab6 100755
--- a/testing/install_external_dependencies.sh
+++ b/testing/install_external_dependencies.sh
@@ -44,6 +44,6 @@ if [[ -n "$PYTHON" ]] ; then
   conda update -q conda
   conda info -a
   conda config --add channels conda-forge
-  conda install -q matplotlib pandasql ipython jupyter_client ipykernel matplotlib bokeh=0.12.6
+  conda install -q matplotlib pandasql ipython=5.4.1 jupyter_client ipykernel matplotlib bokeh=0.12.6
   pip install -q grpcio ggplot
 fi