diff --git a/raven/requirements.txt b/raven/requirements.txt
index b5d69dd..ab35134 100644
--- a/raven/requirements.txt
+++ b/raven/requirements.txt
@@ -28,6 +28,6 @@ six==1.15.0
 soupsieve==2.0.1
 toml==0.10.1
 urllib3==1.25.10
-waitress==1.4.4
+waitress==2.1.1
 Werkzeug==1.0.1
 wrapt==1.12.1