diff --git a/deploy/charts/cert-manager/README.template.md b/deploy/charts/cert-manager/README.template.md
index 4538649b7..fb62fb075 100644
--- a/deploy/charts/cert-manager/README.template.md
+++ b/deploy/charts/cert-manager/README.template.md
@@ -8,7 +8,7 @@ to renew certificates at an appropriate time before expiry.
 
 ## Prerequisites
 
-- Kubernetes 1.20+
+- Kubernetes 1.22+
 
 ## Installing the Chart