diff --git a/src/Rzd/Query.php b/src/Rzd/Query.php
index 70fc9f9..e80862f 100644
--- a/src/Rzd/Query.php
+++ b/src/Rzd/Query.php
@@ -75,6 +75,10 @@ public function send($path, array $params = [], $method = 'post'): Curl
         $this->curl->setCookieJar($cookieFile);
         $this->run($path, $params, $method);
 
+        if ($this->curl->error) {
+            throw new RuntimeException($this->curl->errorMessage);
+        }
+
         return $this->curl;
     }