diff --git a/pip-sample/requirements.txt b/pip-sample/requirements.txt
index 680d0816..6064ddca 100644
--- a/pip-sample/requirements.txt
+++ b/pip-sample/requirements.txt
@@ -11,7 +11,7 @@ google==2.0.1
 google-cloud==0.34.0
 gtfs-realtime-bindings==0.0.5
 html5lib==1.0.1
-idna==2.7
+idna==3.7
 ipykernel==5.0.0
 ipython-genutils==0.2.0
 ipywidgets==7.4.2