diff --git a/requirements.txt b/requirements.txt
index 4ae8c73..ac0ff8f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -34,7 +34,7 @@ translationstring==1.3
 urllib3==1.23
 venusian==1.1.0
 vine==1.1.4
-waitress==1.1.0
+waitress==1.4.2
 WebOb==1.8.2
 xylose==1.33.1
 zope.deprecation==4.3.0