diff --git a/04-fibonacci/index.js b/04-fibonacci/index.js
index 37c64cc..0131f9a 100644
--- a/04-fibonacci/index.js
+++ b/04-fibonacci/index.js
@@ -1,4 +1,11 @@
 export function fibonacci(value) {
   // implementar logica aqui
-  
-}
\ No newline at end of file
+  let f = [];
+  f[0] = 0;
+  f[1] = 1;
+  for (n = 2; n <= value; n++) {
+    f[n] = f[n - 1] + f[n - 2];
+  }
+
+  return f[value];
+}