diff --git a/scheduler/requirements.txt b/scheduler/requirements.txt
index 76053790f87..c9ba90b1f68 100644
--- a/scheduler/requirements.txt
+++ b/scheduler/requirements.txt
@@ -1,3 +1,3 @@
 Flask==1.1.1
-gunicorn==20.0.4
+gunicorn==22.0.0
 google-cloud-scheduler==1.2.1