diff --git a/appengine/flexible/storage/requirements.txt b/appengine/flexible/storage/requirements.txt
index b4b161b134d..ad6e7feb3e8 100644
--- a/appengine/flexible/storage/requirements.txt
+++ b/appengine/flexible/storage/requirements.txt
@@ -1,3 +1,3 @@
 Flask==1.1.1
 google-cloud-storage==1.23.0
-gunicorn==20.0.4
+gunicorn==22.0.0