diff --git a/requirements.txt b/requirements.txt
index 0eb0d06..7134395 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -232,7 +232,7 @@ tokenization==1.0.7
 toolz==0.10.0
 torch==1.3.1
 torchvision==0.4.2
-tornado==6.0.3
+tornado==6.3.2
 tqdm==4.41.0
 traitlets==4.3.3
 transformers==2.3.0