diff --git a/src/app/services/processmanager.service.ts b/src/app/services/processmanager.service.ts
index 80b8544..f8d289c 100644
--- a/src/app/services/processmanager.service.ts
+++ b/src/app/services/processmanager.service.ts
@@ -3,6 +3,7 @@ import { Injectable } from '@angular/core';
 import { WebSocketService } from './websocket.service';
 import { ProcessCommand } from './processcommand';
 import { filter } from 'rxjs/operators';
+import { WSMessage } from './wsmessage';
 
 
 @Injectable()
@@ -16,11 +17,11 @@ export class ProcessManagerService {
     this.webSocketService.connect();
   }
 
-  subscribeCallback(process_name: string, callback: (event: any) => void) {
+  subscribeCallback(process_name: string, callback: (event: WSMessage<ProcessCommand>) => void) {
     this.observeProcessMessage(process_name).subscribe(callback);
   }
 
-  subscribeErrorCallback(process_name: string, callback: (event: any) => void) {
+  subscribeErrorCallback(process_name: string, callback: (event: WSMessage<ProcessCommand>) => void) {
     this.observeProcessMessage(process_name).pipe(filter(message => 'error' in message.data)).subscribe(callback);
   }