diff --git a/04-fibonacci/index.js b/04-fibonacci/index.js
index 716e088..5c82af6 100644
--- a/04-fibonacci/index.js
+++ b/04-fibonacci/index.js
@@ -1,4 +1,8 @@
 export function fibonacci(value) {
   // implementar logica aqui
-
+  let arr = [ 0, 1 ];
+  for (let i = 2; i < value + 1; i++) {
+      arr.push ( arr [ i - 2 ] + arr [ i - 1 ] )
+  }
+  return arr [ value ];
 }
\ No newline at end of file