diff --git a/04-fibonacci/index.js b/04-fibonacci/index.js
index 37c64cc..b32d40a 100644
--- a/04-fibonacci/index.js
+++ b/04-fibonacci/index.js
@@ -1,4 +1,8 @@
 export function fibonacci(value) {
   // implementar logica aqui
-  
-}
\ No newline at end of file
+  let arr = [0, 1];
+  for (let i = 2; i < value + 1; i++) {
+    arr.push(arr[i - 2] + arr[i - 1]);
+  }
+  return arr[value];
+}