diff --git a/requirements.txt b/requirements.txt
index e6c6463f..b5e7b286 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -57,7 +57,7 @@ translationstring==1.3
 Unidecode==1.0.23
 urllib3==1.24.1
 venusian==1.2.0
-waitress==1.2.1
+waitress==1.4.2
 WebOb==1.8.5
 WebTest==2.0.33
 xylose==1.35.1