diff --git a/requirements.txt b/requirements.txt
index 63bd242..a5e88db 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -33,7 +33,7 @@ rsa==4.6
 six==1.15.0
 SQLAlchemy==1.3.18
 toml==0.10.1
-waitress==1.4.4
+waitress==2.1.1
 wcwidth==0.2.5
 Werkzeug==1.0.1
 wrapt==1.12.1