diff --git a/setup/requirements.txt b/setup/requirements.txt
index 9124971..29300d6 100644
--- a/setup/requirements.txt
+++ b/setup/requirements.txt
@@ -59,7 +59,7 @@ terminado==0.8.1
 testpath==0.4.2
 thinc==6.12.1
 toolz==0.9.0
-tornado==5.1.1
+tornado==6.3.3
 tqdm==4.28.1
 traitlets==4.3.2
 ujson==1.35