diff --git a/docs/install/kubernetes.md b/docs/install/kubernetes.md
index 8459564..0931474 100644
--- a/docs/install/kubernetes.md
+++ b/docs/install/kubernetes.md
@@ -93,4 +93,4 @@ spec:
 
 Advanced deployment is to deploy Goma Gateway using its Kubernetes Operator.
 
-See Operator Manuel
+See Operator Manual
diff --git a/docs/middleware/oauth.md b/docs/middleware/oauth.md
index 6208c16..13e4068 100644
--- a/docs/middleware/oauth.md
+++ b/docs/middleware/oauth.md
@@ -74,36 +74,3 @@ nav_order: 5
       middlewares:
         - oauth-authentik
 ```
-
-## Advanced Kubernetes deployment
-
-```yaml
-apiVersion: gomaproj.github.io/v1beta1
-kind: Middleware
-metadata:
-  name: oauth-middleware-sample
-spec:
-    type: oauth
-    paths:
-      - /protected
-      - /example-of-oauth
-    rule:
-      clientId: xxx
-      clientSecret: xxx
-      # oauth provider google, gitlab, github, amazon, facebook, custom
-      provider: custom
-      endpoint:
-        authUrl: https://authentik.example.com/application/o/authorize/
-        tokenUrl: https://authentik.example.com/application/o/token/
-        userInfoUrl: https://authentik.example.com/application/o/userinfo/
-      redirectUrl: https://example.com/callback
-      #RedirectPath is the PATH to redirect users after authentication, e.g: /my-protected-path/dashboard
-      redirectPath: ''
-      #CookiePath e.g.: /my-protected-path or / || by default is applied on a route path
-      cookiePath: "/"
-      scopes:
-        - email
-        - openid
-      state: randomStateString
-      jwtSecret: your-strong-jwt-secret | It's optional
-```
\ No newline at end of file
diff --git a/docs/operator-manual/gateway.md b/docs/operator-manual/gateway.md
index a0f3978..118fd40 100644
--- a/docs/operator-manual/gateway.md
+++ b/docs/operator-manual/gateway.md
@@ -77,12 +77,3 @@ spec:
     targetMemoryUtilizationPercentage: 80
   affinity: {}
 ```
-### Delete gateway
-```shell
-kubectl delete gateway (gatewayName)
-```
-Or
-
-```shell
-kubectl delete gateways.gomaproj.github.io (gatewayName)
-```
\ No newline at end of file
diff --git a/docs/operator-manual/middlware.md b/docs/operator-manual/middlware.md
index a9e8a51..134b4fd 100644
--- a/docs/operator-manual/middlware.md
+++ b/docs/operator-manual/middlware.md
@@ -47,3 +47,50 @@ spec:
       - /internal/*
       - /actuator/*
 ```
+## OAuth2
+
+```yaml
+apiVersion: gomaproj.github.io/v1beta1
+kind: Middleware
+metadata:
+  name: oauth-middleware-sample
+spec:
+    type: oauth
+    paths:
+      - /protected
+      - /example-of-oauth
+    rule:
+      clientId: xxx
+      clientSecret: xxx
+      # oauth provider google, gitlab, github, amazon, facebook, custom
+      provider: custom
+      endpoint:
+        authUrl: https://authentik.example.com/application/o/authorize/
+        tokenUrl: https://authentik.example.com/application/o/token/
+        userInfoUrl: https://authentik.example.com/application/o/userinfo/
+      redirectUrl: https://example.com/callback
+      #RedirectPath is the PATH to redirect users after authentication, e.g: /my-protected-path/dashboard
+      redirectPath: ''
+      #CookiePath e.g.: /my-protected-path or / || by default is applied on a route path
+      cookiePath: "/"
+      scopes:
+        - email
+        - openid
+      state: randomStateString
+      jwtSecret: your-strong-jwt-secret | It's optional
+```
+## Rate Limiting 
+
+```yaml
+apiVersion: gomaproj.github.io/v1beta1
+kind: Middleware
+metadata:
+  name: ratelimit-middleware-sample
+spec:
+    type: ratelimit
+    paths:
+      - /*
+    rule:
+      unit: minute # or hour
+      requestsPerUnit: 60
+```
\ No newline at end of file