diff --git a/docs/requirements.in b/docs/requirements.in
index b942119..136ee49 100644
--- a/docs/requirements.in
+++ b/docs/requirements.in
@@ -9,6 +9,6 @@ mock
 autodoc
 
 defusedxml
-tornado==6.4.1
+tornado==6.4.2
 jinja2==3.1.4
 idna==3.7
diff --git a/docs/requirements.txt b/docs/requirements.txt
index d9f9afc..43b42f6 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -88,7 +88,7 @@ sphinxcontrib-qthelp==1.0.3
     # via sphinx
 sphinxcontrib-serializinghtml==1.1.9
     # via sphinx
-tornado==6.4.1
+tornado==6.4.2
     # via
     #   -r requirements.in
     #   livereload