diff --git a/docs/samples/v1alpha2/custom/hello-world/requirements.txt b/docs/samples/v1alpha2/custom/hello-world/requirements.txt
index 573d9bfa6..d0b9324ee 100644
--- a/docs/samples/v1alpha2/custom/hello-world/requirements.txt
+++ b/docs/samples/v1alpha2/custom/hello-world/requirements.txt
@@ -1,2 +1,2 @@
 Flask==1.1.1
-gunicorn==20.0.4
+gunicorn==22.0.0