diff --git a/src/authchecker.ts b/src/authchecker.ts
index 9b62dfa..f32ec75 100644
--- a/src/authchecker.ts
+++ b/src/authchecker.ts
@@ -1,5 +1,6 @@
 import * as jwt from "jsonwebtoken";
-import { Action, HttpError } from "routing-controllers";
+import { Action } from "routing-controllers";
+import { IllegalJWTError, NoPermissionError } from './errors/AuthError';
 // -----------
 const sampletoken = jwt.sign({
     "permissions": {
@@ -22,7 +23,7 @@ const authchecker = async (action: Action, permissions: string | string[]) => {
     try {
         jwtPayload = <any>jwt.verify(provided_token, process.env.JWT_SECRET || "secretjwtsecret");
     } catch (error) {
-        throw new HttpError(401, "jwt_illegal")
+        throw new IllegalJWTError()
     }
     if (jwtPayload.permissions) {
         action.response.local = {}
@@ -34,11 +35,11 @@ const authchecker = async (action: Action, permissions: string | string[]) => {
             if (actual_accesslevel_for_permission.includes(permission_access_level)) {
                 return true;
             } else {
-                throw new HttpError(403, "no")
+                throw new NoPermissionError()
             }
         });
     } else {
-        throw new HttpError(403, "no")
+        throw new NoPermissionError()
     }
     // 
     try {