diff --git a/requirements.txt b/requirements.txt
index c946498..93d46de 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ phonenumbers==8.10.17
 python-dotenv==0.10.3
 
 # Production dependencies
-gunicorn==19.9.0
+gunicorn==21.1.0
 
 # Test dependencies
 coverage==4.5.4