diff --git a/doc/requirements.txt b/doc/requirements.txt
index 73fe96278c..794bbb7c48 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -19,4 +19,4 @@ mistune>=3.3.0 # not directly required, pinned by Snyk to avoid a vulnerability
 nbconvert>=7.17.0 # not directly required, pinned by Snyk to avoid a vulnerability
 pillow>=12.3.0 # not directly required, pinned by Snyk to avoid a vulnerability
 soupsieve>=2.8.4 # not directly required, pinned by Snyk to avoid a vulnerability
-tornado>=6.5.3 # not directly required, pinned by Snyk to avoid a vulnerability
+tornado>=6.5.5 # not directly required, pinned by Snyk to avoid a vulnerability