diff --git a/notification-manager/requirements.txt b/notification-manager/requirements.txt
index bd956e33b..df850b6ee 100644
--- a/notification-manager/requirements.txt
+++ b/notification-manager/requirements.txt
@@ -14,7 +14,7 @@ chardet==4.0.0
 click==8.1.3
 flask-marshmallow==0.11.0
 flask-cors==3.0.10
-gunicorn==20.1.0
+gunicorn==22.0.0
 idna==2.10
 itsdangerous==2.1.2
 jaeger-client==4.4.0