diff --git a/src/main/java/mops/gruppen2/domain/event/AddUserEvent.java b/src/main/java/mops/gruppen2/domain/event/AddUserEvent.java
index 09ca712..02bcb6c 100644
--- a/src/main/java/mops/gruppen2/domain/event/AddUserEvent.java
+++ b/src/main/java/mops/gruppen2/domain/event/AddUserEvent.java
@@ -35,6 +35,10 @@ public class AddUserEvent extends Event {
         if (group.getMembers().contains(user)) {
             throw new UserAlreadyExistsException(this.getClass().toString());
         }
+        //andere exception
+        if (group.getMembers().size() == group.getUserMaximum()){
+            throw new UserAlreadyExistsException(this.getClass().toString());
+        }
 
         group.getMembers().add(user);
         group.getRoles().put(userId, Role.MEMBER);