diff --git a/papers/SubTagger/requirements_pip.txt b/papers/SubTagger/requirements_pip.txt
index 768947c..7abd497 100644
--- a/papers/SubTagger/requirements_pip.txt
+++ b/papers/SubTagger/requirements_pip.txt
@@ -127,7 +127,7 @@ thinc==7.0.4
 toolz==0.9.0
 torch==1.1.0
 torchvision==0.3.0
-tornado==6.0.2
+tornado==6.3.2
 tqdm==4.32.2
 traitlets==4.3.2
 ujson==1.35