diff --git a/lib/HttpClient/CurlClient.php b/lib/HttpClient/CurlClient.php
index 6bc86e32b..13db222f6 100644
--- a/lib/HttpClient/CurlClient.php
+++ b/lib/HttpClient/CurlClient.php
@@ -22,6 +22,10 @@
 }
 // @codingStandardsIgnoreEnd
 
+if (!defined('CURL_HTTP_VERSION_2_0')) {
+    define('CURL_HTTP_VERSION_2_0', 3);
+}
+
 class CurlClient implements ClientInterface
 {
     private static $instance;
@@ -193,6 +197,9 @@ public function request($method, $absUrl, $headers, $params, $hasFile)
             $opts[CURLOPT_SSL_VERIFYPEER] = false;
         }
 
+        // Enable HTTP/2, if supported
+        $opts[CURLOPT_HTTP_VERSION] = CURL_HTTP_VERSION_2_0;
+
         list($rbody, $rcode) = $this->executeRequestWithRetries($opts, $absUrl);
 
         return [$rbody, $rcode, $rheaders];