diff --git a/requirements.txt b/requirements.txt
index efde2c614..f75a1e5ff 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,7 @@ six==1.10.0
 splinter==0.7.3
 translationstring==1.3
 venusian==1.0
-waitress==0.8.10
+waitress==2.1.1
 WebOb==1.6.1
 wheel==0.24.0
 zope.deprecation==4.1.2