diff --git a/04-fibonacci/index.js b/04-fibonacci/index.js
index 0c8a62d..26a0234 100644
--- a/04-fibonacci/index.js
+++ b/04-fibonacci/index.js
@@ -1,13 +1,11 @@
 export function fibonacci(value) {
-  var i;
-  var fib = [0, 1];
+  let i;
+  const fib = [0, 1];
   let numero = undefined;
   for (i = 2; i <= value; i++) {
     fib[i] = fib[i - 2] + fib[i - 1];
     numero = fib[i];
   }
-
   if (numero !== undefined) return numero;
-
   return value;
 }