diff --git a/distance/requirements.txt b/distance/requirements.txt
index ce72a81..8b4e95f 100644
--- a/distance/requirements.txt
+++ b/distance/requirements.txt
@@ -17,5 +17,5 @@ SQLAlchemy==1.1.5
 SQLAlchemy-Utils==0.32.12
 urllib3==1.20
 venusian==1.0
-waitress==0.8.9
+waitress==1.4.1
 WebOb==1.7.1