diff --git a/04-fibonacci/index.js b/04-fibonacci/index.js
index 37c64cc..f3dd52e 100644
--- a/04-fibonacci/index.js
+++ b/04-fibonacci/index.js
@@ -1,4 +1,8 @@
 export function fibonacci(value) {
   // implementar logica aqui
-  
+  const arr = [0, 1];
+  for (let i = 2; i <= value; i++) {
+    arr[i] = arr[i - 2] + arr[i - 1];
+  }
+  return arr[value]; 
 }
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