diff --git a/requirements.txt b/requirements.txt
index f5be769..d2acd18 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -40,7 +40,7 @@ selenium==3.141.0
 six==1.12.0
 soupsieve==1.9.1
 urllib3==1.25.2
-waitress==1.4.3
+waitress==2.1.1
 WebOb==1.8.5
 WebTest==2.0.33
 xlrd==1.2.0