diff --git a/src/Application/Actions/Search/ListUsersJson.php b/src/Application/Actions/Search/ListUsersJson.php
index 019f1cdf86b8a00bed2c709804265c7b8f92f026..dd491f6428770b99809e86bb5f3ee2a0f402764a 100644
--- a/src/Application/Actions/Search/ListUsersJson.php
+++ b/src/Application/Actions/Search/ListUsersJson.php
@@ -30,7 +30,8 @@ class ListUsersJson extends Action
 
         $parsedRequestBody = (array)$this->request->getParsedBody();
 
-        $search =  $this->request->getQueryParams()['q'];
+        $queryParams = $this->request->getQueryParams();
+        $search = isset($queryParams['q']) ? $queryParams['q'] : '';
         
         $users_query = $this->userRepository->createQueryBuilder('u');
         $users_list = $users_query