diff --git a/requirements.txt b/requirements.txt
index e253741..6fb75d6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -35,7 +35,7 @@ translationstring==1.4
 ujson==5.1.0
 urllib3==1.26.8
 venusian==3.0.0
-waitress==2.0.0
+waitress==2.1.0
 WebOb==1.8.7
 zope.deprecation==4.4.0
 zope.interface==5.4.0