diff --git a/rest-service/requirements.txt b/rest-service/requirements.txt
index 6b27fdc..2ecf5a4 100644
--- a/rest-service/requirements.txt
+++ b/rest-service/requirements.txt
@@ -3,7 +3,7 @@ Click==7.1.2
 dicttoxml==1.7.4
 Flask==1.1.2
 Flask-RESTful==0.3.8
-gunicorn==20.0.4
+gunicorn==23.0.0
 itsdangerous==1.1.0
 Jinja2==2.11.3
 MarkupSafe==1.1.1