diff --git a/requirements.txt b/requirements.txt
index 2725ef7..61b21cc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -33,7 +33,7 @@ translationstring==1.3
 ujson==2.0.3
 urllib3==1.24.2
 venusian==3.0.0
-waitress==1.4.3
+waitress==1.4.4
 WebOb==1.8.6
 zope.deprecation==4.4.0
 zope.interface==5.1.0