diff --git a/src/index.js b/src/index.js
index 2f46b4b..188c57b 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,8 +1,11 @@
 const { StackObj } = require ('./stack-obj');
 
 function baseConverter(decNumber, base) {
-  // your code
-  return ;
+  if((base % 2 == 0) && base < 37 && base != 0) {
+    return decNumber.toString(base).toUpperCase();
+  } else {
+    return null;
+  }
 }
 
 module.exports = { baseConverter };