diff --git a/core/README.md b/core/README.md
index f95b611c..da142b00 100644
--- a/core/README.md
+++ b/core/README.md
@@ -129,7 +129,7 @@ import { LoaderConfOptions, MockerAPIOptions } from 'kkt';
 
 type KKTRC = {
   proxySetup?: (app: express.Application) => MockerAPIOptions;
-  devServer?: (config: WebpackDevServer.Configuration) => WebpackDevServer.Configuration;
+  devServer?: (config: WebpackDevServer.Configuration, options: DevServerOptions) => WebpackDevServer.Configuration;
   default?: (conf: Configuration, evn: string, options: LoaderConfOptions) => Configuration | Promise<Configuration>;
 };
 ```
diff --git a/core/src/scripts/start.ts b/core/src/scripts/start.ts
index bda26d2a..60730265 100644
--- a/core/src/scripts/start.ts
+++ b/core/src/scripts/start.ts
@@ -29,7 +29,7 @@ export default async function build(argvs: ParsedArgs) {
       const serverConf = createDevServerConfig(proxy, allowedHost);
       serverConf.headers = { ...serverConf.headers, 'Access-Control-Allow-Origin': '*' };
       if (kktrc && kktrc.devServer && typeof kktrc.devServer === 'function') {
-        return kktrc.devServer(serverConf);
+        return kktrc.devServer(serverConf, { ...argvs, paths });
       }
       return serverConf;
     };
diff --git a/core/src/utils/loaderConf.ts b/core/src/utils/loaderConf.ts
index 20dc7648..a3610ee6 100644
--- a/core/src/utils/loaderConf.ts
+++ b/core/src/utils/loaderConf.ts
@@ -40,9 +40,11 @@ export type DevServerConfigFunction = (
   allowedHost: string,
 ) => WebpackDevServer.Configuration;
 
+export type DevServerOptions = ParsedArgs & Pick<LoaderConfOptions, 'paths' | 'paths'>;
+
 export type KKTRC = {
   proxySetup?: (app: express.Application) => MockerAPIOptions;
-  devServer?: (config: WebpackDevServer.Configuration) => WebpackDevServer.Configuration;
+  devServer?: (config: WebpackDevServer.Configuration, options: DevServerOptions) => WebpackDevServer.Configuration;
   default?: (conf: Configuration, evn: string, options: LoaderConfOptions) => Configuration | Promise<Configuration>;
 };