diff --git a/frozen-requirements.txt b/frozen-requirements.txt
index 62cc77e4..d92c4c78 100644
--- a/frozen-requirements.txt
+++ b/frozen-requirements.txt
@@ -99,7 +99,7 @@ urllib3==1.25.3
 urwid==2.0.1
 uWSGI==2.0.18
 vine==1.3.0
-waitress==1.2.1
+waitress==2.1.1
 webencodings==0.5.1
 WebOb==1.8.5
 WebTest==2.0.33