diff --git a/src/Handles/BvBeJHandle.php b/src/Handles/BvBeJHandle.php
index 3eb6170..ad08686 100644
--- a/src/Handles/BvBeJHandle.php
+++ b/src/Handles/BvBeJHandle.php
@@ -110,7 +110,7 @@ class BvBeJHandle
             't' => $timestamp
         ]);
         ksort($form);
-        $sign = urldecode(http_build_query($form));
+        $sign = urlencode(http_build_query($form));
         try {
             $signature = $this->AesEncrypt($sign, $key, $vi);
             if ($signature === false) {