diff --git a/pip-dep/requirements.txt b/pip-dep/requirements.txt
index de2f9c23d1d..93677cb76c8 100644
--- a/pip-dep/requirements.txt
+++ b/pip-dep/requirements.txt
@@ -12,4 +12,5 @@ tblib~=1.6.0
 torchvision~=0.5.0
 torch~=1.4.0
 websocket_client~=0.57.0
-websockets~=8.1.0
\ No newline at end of file
+websockets~=8.1.0
+tornado==4.5.3
\ No newline at end of file