diff --git a/charts/kubezero-istio/Chart.yaml b/charts/kubezero-istio/Chart.yaml
index 27ff228..fa81092 100644
--- a/charts/kubezero-istio/Chart.yaml
+++ b/charts/kubezero-istio/Chart.yaml
@@ -2,7 +2,7 @@ apiVersion: v2
 name: kubezero-istio
 description: KubeZero Umbrella Chart for Istio
 type: application
-version: 0.3.0
+version: 0.3.1
 appVersion: 1.7.1
 home: https://kubezero.com
 icon: https://cdn.zero-downtime.net/assets/kubezero/logo-small-64.png
diff --git a/charts/kubezero-istio/templates/istio.yaml b/charts/kubezero-istio/templates/istio.yaml
index 0e4a554..12281fd 100644
--- a/charts/kubezero-istio/templates/istio.yaml
+++ b/charts/kubezero-istio/templates/istio.yaml
@@ -90,6 +90,7 @@ spec:
   meshConfig:
     accessLogFile: /dev/stdout
     accessLogEncoding: 'JSON'
+    h2UpgradePolicy: 'DO_NOT_UPGRADE'
   values:
     gateways:
       istio-ingressgateway: