diff --git a/requirements.txt b/requirements.txt
index 2f965bb3e..33a7e813e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -42,7 +42,7 @@ setuptools==78.1.1
 six==1.12.0
 terminado==0.17.1
 testpath==0.4.2
-tornado==6.5.1
+tornado==6.5.5
 traitlets==5.9.0
 wcwidth==0.1.7
 webencodings==0.5.1