diff --git a/requirements/docs.txt b/requirements/docs.txt
index c98f2e59c63..a31ed5702c5 100644
--- a/requirements/docs.txt
+++ b/requirements/docs.txt
@@ -12,4 +12,4 @@ mkdocs-rtd-dropdown==1.0.2
 pymdown-extensions==5.0
 PyYAML==5.3.1
 singledispatch==3.4.0.3
-tornado==5.1.1
+tornado==6.5.3