diff --git a/content/en/docs/installing-on-kubernetes/introduction/prerequisites.md b/content/en/docs/installing-on-kubernetes/introduction/prerequisites.md
index 12ca3dbce..9a36405e3 100644
--- a/content/en/docs/installing-on-kubernetes/introduction/prerequisites.md
+++ b/content/en/docs/installing-on-kubernetes/introduction/prerequisites.md
@@ -9,7 +9,7 @@ weight: 4120
 You can install KubeSphere on virtual machines and bare metal with Kubernetes also provisioned. In addition, KubeSphere can also be deployed on cloud-hosted and on-premises Kubernetes clusters as long as your Kubernetes cluster meets the prerequisites below.
 
 - Kubernetes version: 1.15.x, 1.16.x, 1.17.x, 1.18.x.
-- Avaiable CPU > 1 Core and Memory > 2 G.
+- Available CPU > 1 Core and Memory > 2 G.
 - A **default** StorageClass in your Kubernetes cluster is configured; use `kubectl get sc` to verify it.
 - The CSR signing feature is activated in kube-apiserver when it is started with the `--cluster-signing-cert-file` and `--cluster-signing-key-file` parameters. See [RKE installation issue](https://github.com/kubesphere/kubesphere/issues/1925#issuecomment-591698309).