diff --git a/src/fibRoute.ts b/src/fibRoute.ts
index e4fa96e..26a97ff 100644
--- a/src/fibRoute.ts
+++ b/src/fibRoute.ts
@@ -1,11 +1,12 @@
 // Endpoint for querying the fibonacci numbers
 
+import { Request, Response } from 'express';
 import fibonacci from "./fib";
 
-export default (req, res) => {
+export default (req : Request, res : Response) => {
   const { num } = req.params;
 
-  const fibN = fibonacci(parseInt(num));
+  const fibN : number = fibonacci(parseInt(num));
   let result = `fibonacci(${num}) is ${fibN}`;
 
   if (fibN < 0) {