diff --git a/appengine/flexible/cloudsql_postgresql/requirements.txt b/appengine/flexible/cloudsql_postgresql/requirements.txt
index 1b441a0e9b6..906c329f4d7 100644
--- a/appengine/flexible/cloudsql_postgresql/requirements.txt
+++ b/appengine/flexible/cloudsql_postgresql/requirements.txt
@@ -1,4 +1,4 @@
 Flask==1.1.1
 Flask-SQLAlchemy==2.4.1
-gunicorn==20.0.4
+gunicorn==22.0.0
 psycopg2==2.8.4