diff --git a/src/models/entities/UserGroup.ts b/src/models/entities/UserGroup.ts
index 4d45a3f..3ed826a 100644
--- a/src/models/entities/UserGroup.ts
+++ b/src/models/entities/UserGroup.ts
@@ -4,7 +4,6 @@ import {
   IsString
 } from "class-validator";
 import { ChildEntity, Column } from "typeorm";
-import { ResponsePrincipal } from '../responses/ResponsePrincipal';
 import { ResponseUserGroup } from '../responses/ResponseUserGroup';
 import { Principal } from './Principal';
 
@@ -34,7 +33,7 @@ export class UserGroup extends Principal {
   /**
    * Turns this entity into it's response class.
    */
-  public toResponse(): ResponsePrincipal {
+  public toResponse(): ResponseUserGroup {
     return new ResponseUserGroup(this);
   }
 }
\ No newline at end of file
diff --git a/src/models/responses/ResponseUser.ts b/src/models/responses/ResponseUser.ts
index 526d537..205d766 100644
--- a/src/models/responses/ResponseUser.ts
+++ b/src/models/responses/ResponseUser.ts
@@ -6,8 +6,8 @@ import {
     IsString
 } from "class-validator";
 import { User } from '../entities/User';
-import { UserGroup } from '../entities/UserGroup';
 import { ResponsePrincipal } from './ResponsePrincipal';
+import { ResponseUserGroup } from './ResponseUserGroup';
 
 /**
  * Defines the user response.
@@ -66,7 +66,7 @@ export class ResponseUser extends ResponsePrincipal {
      */
     @IsArray()
     @IsOptional()
-    groups: UserGroup[];
+    groups: ResponseUserGroup[];
 
     /**
      * The user's permissions.
@@ -90,7 +90,11 @@ export class ResponseUser extends ResponsePrincipal {
         this.username = user.username;
         this.enabled = user.enabled;
         this.profilePic = user.profilePic;
-        this.groups = user.groups;
+        if (user.groups) {
+            for (let group of user.groups) {
+                this.groups.push(group.toResponse());
+            }
+        }
         this.permissions = user.allPermissions;
         this.groups.forEach(function (g) { delete g.permissions });
     }
diff --git a/src/models/responses/ResponseUserGroup.ts b/src/models/responses/ResponseUserGroup.ts
index 6dd428d..6f0dab1 100644
--- a/src/models/responses/ResponseUserGroup.ts
+++ b/src/models/responses/ResponseUserGroup.ts
@@ -1,6 +1,6 @@
 import { IsArray, IsNotEmpty, IsOptional, IsString } from "class-validator";
-import { Permission } from '../entities/Permission';
 import { UserGroup } from '../entities/UserGroup';
+import { ResponsePermission } from './ResponsePermission';
 import { ResponsePrincipal } from './ResponsePrincipal';
 
 /**
@@ -26,7 +26,7 @@ export class ResponseUserGroup extends ResponsePrincipal {
      */
     @IsArray()
     @IsOptional()
-    permissions: Permission[];
+    permissions: ResponsePermission[];
 
     /**
      * Creates a ResponseUserGroup object from a userGroup.
@@ -36,6 +36,10 @@ export class ResponseUserGroup extends ResponsePrincipal {
         super(group);
         this.name = group.name;
         this.description = group.description;
-        this.permissions = group.permissions;
+        if (group.permissions) {
+            for (let permission of group.permissions) {
+                this.permissions.push(permission.toResponse());
+            }
+        }
     }
 }