diff --git a/src/Client/RedmineClientInterface.php b/src/Client/RedmineClientInterface.php
index 0aa7445..9479d58 100644
--- a/src/Client/RedmineClientInterface.php
+++ b/src/Client/RedmineClientInterface.php
@@ -3,6 +3,7 @@
 namespace Magdev\RedmineBundle\Client;
 
 use Redmine\Client\Client;
+use Redmine\Client\Psr18Client;
 
 interface RedmineClientInterface extends Client
 {