diff --git a/requirements.txt b/requirements.txt
index a6641fd..df8dfee 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -38,7 +38,7 @@ seaborn==0.9.0
 setuptools==65.5.1
 six==1.11.0
 statsmodels==0.9.0
-tornado==5.1.1
+tornado==6.3.3
 traitlets==4.3.2
 wcwidth==0.1.7
 wheel==0.38.1