diff --git a/requirements.txt b/requirements.txt
index 96e66087..c856f4dd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -33,7 +33,7 @@ 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
 typing_extensions==4.5.0
 urllib3==1.26.12
 zipp==3.10.0