diff --git a/charts/greptimedb-operator/Chart.yaml b/charts/greptimedb-operator/Chart.yaml
index 1d52940..03fb819 100644
--- a/charts/greptimedb-operator/Chart.yaml
+++ b/charts/greptimedb-operator/Chart.yaml
@@ -1,9 +1,9 @@
 apiVersion: v2
-kubeVersion: ">=1.19.0-0"
+kubeVersion: ">=1.18.0-0"
 description: The greptimedb-operator Helm chart for Kubernetes
 name: greptimedb-operator
 appVersion: 0.1.0-alpha.12
-version: 0.1.1-alpha.7
+version: 0.1.1-alpha.8
 type: application
 home: https://github.com/GreptimeTeam/greptimedb-operator
 sources: