diff --git a/requirements.txt b/requirements.txt
index 02063e8..c48ae63 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -90,7 +90,7 @@ sphinxcontrib-serializinghtml==1.1.10
 stack_data==0.6.3
 tinycss2==1.5.1
 tomli==2.4.0
-tornado==6.5.3
+tornado==6.5.5
 traitlets==5.14.3
 typing_extensions==4.15.0
 ukkonen==1.0.1