diff --git a/requirements.txt b/requirements.txt
index e570a51..b6acd7e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -55,7 +55,7 @@ six==1.14.0
 spacy==2.2.4
 srsly==1.0.2
 thinc==7.4.0
-tornado==6.0.4
+tornado==6.4.1
 tqdm==4.45.0
 traitlets==4.3.3
 urllib3==1.25.9