diff --git a/04-fibonacci/index.js b/04-fibonacci/index.js
index 37c64cc..9aacc7c 100644
--- a/04-fibonacci/index.js
+++ b/04-fibonacci/index.js
@@ -1,4 +1,11 @@
 export function fibonacci(value) {
   // implementar logica aqui
+  if (value === 0){
+    return value
+}else if (value === 1) {
+    return value
+}else{
+    return fibonacci(value - 1) + fibonacci(value - 2)
+}    
   
 }
\ No newline at end of file