diff --git a/docs/config/cert.md b/docs/config/cert.md
index 6dd55a2e..e9508e31 100644
--- a/docs/config/cert.md
+++ b/docs/config/cert.md
@@ -17,7 +17,7 @@ title: 自定义根证书
 ```yaml
 cert:
   file: "C:/path/to/mycert.pem"
-  keyFile: "C:/path/to/mykey.pem"
+  key: "C:/path/to/mykey.pem"
   name: "MyProxyCA"
 ```