diff --git a/requirements.txt b/requirements.txt
index 514b2748f..5b9214685 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -93,7 +93,7 @@ testpath==0.4.2
 tf-estimator-nightly==1.14.0.dev2019080601
 tornado==6.0.3
 traitlets==4.3.2
-waitress==1.4.4
+waitress==2.1.1
 wcwidth==0.1.7
 webencodings==0.5.1
 Werkzeug==0.15.5