diff --git a/src/UnicaenAuth/Authentication/Adapter/Cas.php b/src/UnicaenAuth/Authentication/Adapter/Cas.php
index d66a31ee37fd9f1c5395dbf69132a6da7cbd70d4..0cef797e9e23951653de7e998794300c8fe710a5 100644
--- a/src/UnicaenAuth/Authentication/Adapter/Cas.php
+++ b/src/UnicaenAuth/Authentication/Adapter/Cas.php
@@ -115,6 +115,8 @@ class Cas extends AbstractAdapter implements ServiceManagerAwareInterface, Event
      */
     public function getCasClient($initClient = true)
     {
+        require_once __VENDOR_DIR__ . '/intouch/phpcas/CAS.php';
+        
         if (null === $this->casClient) {
             $this->casClient = new phpCAS();
         }