diff --git a/example/requirements.txt b/example/requirements.txt
index 34c0988..1a1dc86 100644
--- a/example/requirements.txt
+++ b/example/requirements.txt
@@ -26,6 +26,6 @@ pytest-spec==2.0.0
 python-logging-json-formatter==0.1.0
 pytz==2019.3
 tox==3.14.3
-waitress==2.1.1
+waitress==3.0.1
 webassets==2.0
 WebOb==1.8.5