diff --git a/src/app/console/console-command.ts b/src/app/console/console-command.ts
index 3d3813d..c23e6a8 100644
--- a/src/app/console/console-command.ts
+++ b/src/app/console/console-command.ts
@@ -1,7 +1,7 @@
 // Copyright (C) 2018 Avatao.com Innovative Learning Kft.
 // All Rights Reserved. See LICENSE file for details.
 
-export class ConsoleCommand {
+export interface ConsoleCommand {
   command: string;
   content?: string;
   showLiveLogs?: boolean;
diff --git a/src/app/dashboard/layout-command.ts b/src/app/dashboard/layout-command.ts
index 9475f5c..18274fd 100644
--- a/src/app/dashboard/layout-command.ts
+++ b/src/app/dashboard/layout-command.ts
@@ -1,7 +1,7 @@
 // Copyright (C) 2018 Avatao.com Innovative Learning Kft.
 // All Rights Reserved. See LICENSE file for details.
 
-export class LayoutCommand {
+export interface LayoutCommand {
   command: string;
   layout?: string;
   hide_messages?: boolean;
diff --git a/src/app/services/processcommand.ts b/src/app/services/processcommand.ts
index b1fd6a7..8952530 100644
--- a/src/app/services/processcommand.ts
+++ b/src/app/services/processcommand.ts
@@ -1,7 +1,7 @@
 // Copyright (C) 2018 Avatao.com Innovative Learning Kft.
 // All Rights Reserved. See LICENSE file for details.
 
-export class ProcessCommand {
+export interface ProcessCommand {
   command: string;
   process_name: string;
   error?: string;
diff --git a/src/app/services/processlog-command.ts b/src/app/services/processlog-command.ts
index 7889c6f..1ed732e 100644
--- a/src/app/services/processlog-command.ts
+++ b/src/app/services/processlog-command.ts
@@ -1,7 +1,7 @@
 // Copyright (C) 2018 Avatao.com Innovative Learning Kft.
 // All Rights Reserved. See LICENSE file for details.
 
-export class ProcessLogCommand {
+export interface ProcessLogCommand {
   command: string;
   stdout: string;
   stderr: string;