diff --git a/extend/fast/Http.php b/extend/fast/Http.php
index 81f2b17588c1df994787d73b5e29d4f79d155cab..a0dfef7dfee3b3bf240b0ea36c52fb2d05249911 100644
--- a/extend/fast/Http.php
+++ b/extend/fast/Http.php
@@ -60,7 +60,7 @@ class Http
             } else {
                 $defaults[CURLOPT_CUSTOMREQUEST] = $method;
             }
-            $defaults[CURLOPT_POSTFIELDS] = $params;
+            $defaults[CURLOPT_POSTFIELDS] = http_build_query($params);
         }
 
         $defaults[CURLOPT_HEADER] = false;