diff --git a/requirements.txt b/requirements.txt
index 2522e24..ad4caae 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -90,7 +90,7 @@ terminado==0.8.3
 testpath==0.4.4
 textblob==0.15.3
 textstat==0.5.6
-tornado==6.0.3
+tornado==6.4.1
 traitlets==4.3.3
 urllib3==1.25.7
 wcwidth==0.1.7