diff --git a/requirements-notebook.txt b/requirements-notebook.txt
index 6b00f84..4d1905b 100644
--- a/requirements-notebook.txt
+++ b/requirements-notebook.txt
@@ -91,7 +91,7 @@ soupsieve==2.8.3
 stack-data==0.6.3
 terminado==0.18.1
 tinycss2==1.4.0
-tornado==6.5.5
+tornado==6.5.6
 traitlets==5.15.0
 typing_extensions==4.15.0
 tzdata==2026.2