diff --git a/charts/apisix-dashboard/README.md b/charts/apisix-dashboard/README.md
index 1654dbe2..fee3334f 100644
--- a/charts/apisix-dashboard/README.md
+++ b/charts/apisix-dashboard/README.md
@@ -55,7 +55,7 @@ _See [helm uninstall](https://helm.sh/docs/helm/helm_uninstall/) for command doc
 ## Upgrading Chart
 
 ```console
-helm upgrade [RELEASE_NAME] [CHART] --install
+helm upgrade [RELEASE_NAME] [CHART] --install --namespace ingress-apisix
 ```
 
 _See [helm upgrade](https://helm.sh/docs/helm/helm_upgrade/) for command documentation._
diff --git a/charts/apisix-ingress-controller/README.md b/charts/apisix-ingress-controller/README.md
index 11e821cf..6038df3a 100644
--- a/charts/apisix-ingress-controller/README.md
+++ b/charts/apisix-ingress-controller/README.md
@@ -44,7 +44,7 @@ _See [helm uninstall](https://helm.sh/docs/helm/helm_uninstall/) for command doc
 ## Upgrading Chart
 
 ```console
-helm upgrade [RELEASE_NAME] [CHART] --install
+helm upgrade [RELEASE_NAME] [CHART] --install --namespace ingress-apisix
 ```
 
 _See [helm upgrade](https://helm.sh/docs/helm/helm_upgrade/) for command documentation._
diff --git a/docs/en/latest/apisix-dashboard.md b/docs/en/latest/apisix-dashboard.md
index d83a63f4..99491af4 100644
--- a/docs/en/latest/apisix-dashboard.md
+++ b/docs/en/latest/apisix-dashboard.md
@@ -55,5 +55,5 @@ helm install apisix-dashboard apisix/apisix-dashboard --create-namespace --names
 To uninstall/delete the `apisix-dashboard` release:
 
 ```shell
-helm uninstall apisix-dashboard
+helm uninstall apisix-dashboard --namespace apisix
 ```
diff --git a/docs/en/latest/apisix.md b/docs/en/latest/apisix.md
index 19ebb61e..c0c06c08 100644
--- a/docs/en/latest/apisix.md
+++ b/docs/en/latest/apisix.md
@@ -49,7 +49,7 @@ helm repo add apisix https://apache.github.io/apisix-helm-chart && helm repo upd
 To uninstall/delete the `apisix` release:
 
 ```shell
-helm uninstall apisix
+helm uninstall apisix --namespace apisix
 ```
 
 ## Seeking help