diff --git a/requirements.txt b/requirements.txt
index ebe9ddc..fe8dab6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -95,7 +95,7 @@ torch-cluster==1.4.3
 torch-geometric==1.3.0
 torch-scatter==1.3.1
 torchvision==0.4.0a0+9232c4a
-tornado==6.0.3
+tornado==6.3.3
 tqdm==4.32.2
 traitlets==4.3.2
 twython==3.7.0