diff --git a/requirements.txt b/requirements.txt
index 0dd7aa6..54a4e9a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -55,7 +55,7 @@ toml==0.10.1
 typed-ast==1.4.1
 update==0.0.1
 urllib3==1.25.9
-waitress==1.4.4
+waitress==2.1.1
 wcwidth==0.2.4
 Werkzeug==1.0.1
 zipp==3.1.0