diff --git a/doc/requirements.txt b/doc/requirements.txt
index 355caa7a..e0b5f711 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -78,7 +78,7 @@ stack-data==0.6.3 ; python_version >= "3.9" and python_version < "3.15"
 threadpoolctl==3.5.0 ; python_version >= "3.9" and python_version < "3.15"
 tinycss2==1.4.0 ; python_version >= "3.9" and python_version < "3.15"
 tomli==2.2.1 ; python_version >= "3.9" and python_version < "3.15"
-tornado==6.4.2 ; python_version >= "3.9" and python_version < "3.15"
+tornado==6.5.1 ; python_version >= "3.9" and python_version < "3.15"
 traitlets==5.14.3 ; python_version >= "3.9" and python_version < "3.15"
 typing-extensions==4.12.2 ; python_version >= "3.9" and python_version < "3.15"
 tzdata==2025.1 ; python_version >= "3.9" and python_version < "3.15"