diff --git a/appengine/flexible/redis/requirements.txt b/appengine/flexible/redis/requirements.txt
index 3d18cfda2aa..2105a310159 100644
--- a/appengine/flexible/redis/requirements.txt
+++ b/appengine/flexible/redis/requirements.txt
@@ -1,3 +1,3 @@
 Flask==1.1.1
-gunicorn==20.0.4
+gunicorn==22.0.0
 redis==3.3.11