diff --git a/types/finalhandler/finalhandler-tests.ts b/types/finalhandler/finalhandler-tests.ts
index 772a788e30..2667bfc5ac 100644
--- a/types/finalhandler/finalhandler-tests.ts
+++ b/types/finalhandler/finalhandler-tests.ts
@@ -1,15 +1,14 @@
 import { IncomingMessage, ServerResponse } from "http";
-import finalHandler = require("finalhandler");
+import finalhandler = require("finalhandler");
 
 let req: IncomingMessage;
 let res: ServerResponse;
 let options: {
-	onerror: (err: any, req: IncomingMessage, res: ServerResponse) => void;
-	message: boolean|((err: any, status: number) => string);
-	stacktrace: boolean;
+    env: string;
+    onerror: (err: any, req: IncomingMessage, res: ServerResponse) => void;
 };
 
 let result: (err: any) => void;
 
-result = finalHandler(req, res);
-result = finalHandler(req, res, options);
+result = finalhandler(req, res);
+result = finalhandler(req, res, options);
diff --git a/types/finalhandler/index.d.ts b/types/finalhandler/index.d.ts
index d67b9e4a98..79eaf0de13 100644
--- a/types/finalhandler/index.d.ts
+++ b/types/finalhandler/index.d.ts
@@ -1,20 +1,21 @@
 // Type definitions for finalhandler
 // Project: https://github.com/pillarjs/finalhandler
 // Definitions by: Ilya Mochalov <https://github.com/chrootsu>
+//                 Mark Veronda <https://github.com/hbomark>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
 /// <reference types="node" />
 
-import { IncomingMessage, ServerResponse } from "http";
+import { IncomingMessage, ServerResponse } from 'http';
 
-declare function finalHandler(req: IncomingMessage, res: ServerResponse, options?: finalHandler.Options): (err: any) => void;
+declare function finalhandler(req: IncomingMessage, res: ServerResponse,
+                              options?: finalhandler.Options): (err: any) => void;
 
-declare namespace finalHandler {
-	export interface Options {
-		message?: boolean|((err: any, status: number) => string);
-		onerror?: (err: any, req: IncomingMessage, res: ServerResponse) => void;
-		stacktrace?: boolean;
-	}
+declare namespace finalhandler {
+    export interface Options {
+        env?: string,
+        onerror?: (err: any, req: IncomingMessage, res: ServerResponse) => void;
+    }
 }
 
-export = finalHandler;
+export = finalhandler;