diff --git a/src/Helper.php b/src/Helper.php
index ebee3ff..81166b5 100644
--- a/src/Helper.php
+++ b/src/Helper.php
@@ -55,7 +55,7 @@ class Helper
     {
 
         $key = openssl_pkey_new([
-            'private_key_bits' => 4096,
+            'private_key_bits' => 2048,
             'private_key_type' => OPENSSL_KEYTYPE_RSA,
         ]);
         openssl_pkey_export($key, $pem);