diff --git a/verify-jwt/index.js b/verify-jwt/index.js
index fe20b29..c1507f3 100644
--- a/verify-jwt/index.js
+++ b/verify-jwt/index.js
@@ -80,7 +80,10 @@ function _sign(input, key, method) {
 }
 
 function _base64urlDecode(str) {
-    return String.bytesFrom(str, 'base64url')
+    return Buffer.from(str, 'base64url')
+    
+    // For Old Node Version
+// return String.bytesFrom(str, 'base64url')
 }
 
 function handler(event) {