diff --git a/requirements.txt b/requirements.txt
index a4933a8..0c24ae3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,5 +25,5 @@ sphinxcontrib-jsmath==1.0.1
 sphinxcontrib-qthelp==1.0.3
 sphinxcontrib-serializinghtml==1.1.5
 sphinxcontrib-websupport==1.2.4
-tornado==6.4.1
+tornado==6.4.2
 urllib3==1.26.19