diff --git a/src/Downloader.php b/src/Downloader.php
index 18f17ab..2f0985b 100644
--- a/src/Downloader.php
+++ b/src/Downloader.php
@@ -169,6 +169,8 @@ protected function fetchCertificates(string $hostName): array
 
         $response = stream_context_get_params($client);
 
+        fclose($client);
+
         return $response;
     }