diff --git a/system/libraries/Encryption.php b/system/libraries/Encryption.php
index f3e0398..151ce8d 100644
--- a/system/libraries/Encryption.php
+++ b/system/libraries/Encryption.php
@@ -337,6 +337,11 @@
 	 */
 	public function create_key($length)
 	{
+		if (function_exists('random_bytes'))
+		{
+			return random_bytes((int) $length);
+		}
+
 		return ($this->_driver === 'mcrypt')
 			? mcrypt_create_iv($length, MCRYPT_DEV_URANDOM)
 			: openssl_random_pseudo_bytes($length);