diff --git a/index.d.ts b/index.d.ts
index 5226e22..2571eda 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -13,11 +13,11 @@ declare module '@gm5/core' {
   class Five {
     get server(): Server
 
-    set(obj: Config): this
+    set(obj: object): this
 
     get(key: string): any
 
-    use(fn: Middleware): this
+    use(middleware: Middleware | Installable, args?: any): this
 
     install(module: Installable, args: any): this