diff --git a/requirements.txt b/requirements.txt
index dc8deb6d7..4de8143df 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -36,5 +36,5 @@ sphinxcontrib-htmlhelp==2.0.0
 sphinxcontrib-jsmath==1.0.1
 sphinxcontrib-qthelp==1.0.3
 sphinxcontrib-serializinghtml==1.1.5
-tornado==6.3.2
+tornado==6.3.3
 urllib3==1.26.7