diff --git a/src/Handles/BvBeJHandle.php b/src/Handles/BvBeJHandle.php
index 8d95527..a330669 100644
--- a/src/Handles/BvBeJHandle.php
+++ b/src/Handles/BvBeJHandle.php
@@ -110,7 +110,11 @@ class BvBeJHandle
             't' => $timestamp
         ]);
         ksort($form);
-        $sign = http_build_query($form);
+        $singArr = [];
+        foreach ($form as $k => $v) {
+            $singArr[urlencode($k)] = urlencode($v);
+        }
+        $sign = http_build_query($singArr);
         try {
             $signature = $this->AesEncrypt($sign, $key, $vi);
             if ($signature === false) {