diff --git a/docs/en/latest/plugins/authz-keycloak.md b/docs/en/latest/plugins/authz-keycloak.md
index bb968e6f7d71..d0d2b2deeb23 100644
--- a/docs/en/latest/plugins/authz-keycloak.md
+++ b/docs/en/latest/plugins/authz-keycloak.md
@@ -143,6 +143,8 @@ curl --location --request POST 'http://127.0.0.1:9080/api/token' \
 --data-urlencode 'password=<Password>'
 ```
 
+Note: For the value of the `Content-Type` header, it also support the parameterized form which defind in the section [3.1.1.5](https://www.rfc-editor.org/rfc/rfc7231#section-3.1.1.5) of [RFC7231](https://www.rfc-editor.org/rfc/rfc7231). For example `Content-Type: application/json; charset=utf-8`.
+
 ## Enable Plugin
 
 The example below shows how you can enable the `authz-keycloak` Plugin on a specific Route. `${realm}` represents the realm name in Keycloak.
diff --git a/docs/zh/latest/plugins/authz-keycloak.md b/docs/zh/latest/plugins/authz-keycloak.md
index 576f29bd3633..eece05772df0 100644
--- a/docs/zh/latest/plugins/authz-keycloak.md
+++ b/docs/zh/latest/plugins/authz-keycloak.md
@@ -127,6 +127,8 @@ description: 本文介绍了关于 Apache APISIX `authz-keycloak` 插件的基
     --data-urlencode 'password=<Password>'
     ```
 
+    注意：对于`Content-Type`头的值，此插件也支持参数化的形式（具体定义在[RFC7231](https://www.rfc-editor.org/rfc/rfc7231)的第[3.1.1.5](https://www.rfc-editor.org/rfc/rfc7231#section-3.1.1.5)小节）。具体示例`Content-Type: application/json; charset=utf-8`。
+
 ## 如何启用
 
 以下示例为你展示了如何在指定 Route 中启用 `authz-keycloak` 插件，其中 `${realm}` 是 Keycloak 中的 `realm` 名称：