diff --git a/requirements.txt b/requirements.txt
index 1b6f1be..cab88b3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,4 +3,4 @@ Flask==1.1.1
 Flask-Cors==3.0.8
 python-telegram-bot==12.3.0
 expiringdict==1.2.0
-waitress==1.4.2
+waitress==1.4.3