diff --git a/requirements.txt b/requirements.txt
index 91475d4..fada165 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -106,7 +106,7 @@ stumpy==1.12.0
 terminado==0.17.1
 threadpoolctl==3.1.0
 tinycss2==1.2.1
-tornado==6.2
+tornado==6.4.1
 tqdm==4.66.4
 traitlets==5.9.0
 tsfresh==0.20.2