diff --git a/Economic/API/Client.php b/Economic/API/Client.php
index abd7f3e..acedcfc 100644
--- a/Economic/API/Client.php
+++ b/Economic/API/Client.php
@@ -59,6 +59,7 @@ public function shutdown()
     {
         if (!empty($this->ch)) {
             curl_close($this->ch);
+            $this->ch = null;
         }
     }