diff --git a/src/Client.php b/src/Client.php
index 4259d20..5821946 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -94,6 +94,10 @@ public function push(): array
                 define('CURLPIPE_MULTIPLEX', 2);
             }
 
+            if (!defined('CURLMOPT_MAX_HOST_CONNECTIONS')) {
+                define('CURLMOPT_MAX_HOST_CONNECTIONS', 7);
+            }
+
             curl_multi_setopt($this->curlMultiHandle, CURLMOPT_PIPELINING, CURLPIPE_MULTIPLEX);
             curl_multi_setopt($this->curlMultiHandle, CURLMOPT_MAX_HOST_CONNECTIONS, $this->maxConcurrentConnections);
         }