diff --git a/src/main/java/de/szut/lf8_starter/welcome/WelcomeController.java b/src/main/java/de/szut/lf8_starter/welcome/WelcomeController.java
index 6ed067b..a565f3f 100644
--- a/src/main/java/de/szut/lf8_starter/welcome/WelcomeController.java
+++ b/src/main/java/de/szut/lf8_starter/welcome/WelcomeController.java
@@ -3,12 +3,12 @@ package de.szut.lf8_starter.welcome;
 
 
 import org.springframework.http.ResponseEntity;
-import org.springframework.security.access.prepost.PreAuthorize;
 import org.springframework.security.core.Authentication;
+import org.springframework.security.core.GrantedAuthority;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RestController;
 
-import java.security.Principal;
+import java.util.Collection;
 
 @RestController
 public class WelcomeController {
@@ -19,7 +19,7 @@ public class WelcomeController {
     }
 
     @GetMapping("/roles")
-    public ResponseEntity<?> getRoles(Authentication authentication) {
+    public ResponseEntity<Collection<? extends GrantedAuthority>> getRoles(Authentication authentication) {
         return ResponseEntity.ok(authentication.getAuthorities());
     }