diff --git a/components/haemera/requirements.txt b/components/haemera/requirements.txt
index fceac692..0dc97ff6 100644
--- a/components/haemera/requirements.txt
+++ b/components/haemera/requirements.txt
@@ -24,7 +24,7 @@ pytzdata==2020.1
 translationstring==1.4
 venusian==3.0.0
 WebOb==1.8.7
-waitress==2.0.0
+waitress==2.1.0
 zope.component==5.0.1
 zope.deferredimport==4.4
 zope.deprecation==4.4.0