diff --git a/koa-hbs/index.d.ts b/koa-hbs/index.d.ts
index 51c609e296..f38d2e9fdd 100644
--- a/koa-hbs/index.d.ts
+++ b/koa-hbs/index.d.ts
@@ -37,7 +37,7 @@ declare namespace Hbs {
         layoutsPath?: string,
         contentHelperName?: string,
         blockHelperName?: string,
-        disableCache?: boolean 
+        disableCache?: boolean
     }
 }
 
@@ -50,7 +50,7 @@ declare const hbs: Hbs;
 export = hbs;
 
 declare module "koa" {
-    export interface Context extends Request, Response {
+    export interface Context {
         render(tpl: string, locals?: {[key: string]: any}): Promise<void>;
     }
 }
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