diff --git a/requirements.txt b/requirements.txt
index a4dd3b7..6246174 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,4 +7,4 @@ Flask-RESTful==0.3.9
 Flask-CORS==3.0.10
 WeasyPrint==52.5
 Werkzeug==2.0.1
-waitress==2.0.0
+waitress==2.1.1