diff --git a/requirements.txt b/requirements.txt
index 78a52b0..25fb8e5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -27,7 +27,7 @@ translationstring==1.3
 Unidecode==1.1.1
 urllib3==1.25.9
 venusian==3.0.0
-waitress==1.4.3
+waitress==2.1.2
 WebOb==1.8.6
 zope.deprecation==4.4.0
 zope.interface==5.1.0