diff --git a/package.json b/package.json
index b17fd94..069e0e7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "wms-core",
-  "version": "0.10.22",
+  "version": "0.10.23",
   "description": "Node web framework",
   "repository": "git@gitlab.com:ArisuOngaku/wms-core.git",
   "author": "Alice Gaudon <alice@gaudon.pro>",
diff --git a/src/HttpError.ts b/src/HttpError.ts
index 3e7b314..e76ace4 100644
--- a/src/HttpError.ts
+++ b/src/HttpError.ts
@@ -3,7 +3,7 @@ import {WrappingError} from "./Utils";
 export abstract class HttpError extends WrappingError {
     public readonly instructions: string;
 
-    constructor(message: string, instructions: string, cause?: Error) {
+    protected constructor(message: string, instructions: string, cause?: Error) {
         super(message, cause);
         this.instructions = instructions;
     }
@@ -28,6 +28,16 @@ export class BadRequestError extends HttpError {
     }
 }
 
+export class UnauthorizedHttpError extends BadRequestError {
+    constructor(message: string, url: string, cause?: Error) {
+        super(message, '', url, cause);
+    }
+
+    get errorCode(): number {
+        return 401;
+    }
+}
+
 export class ForbiddenHttpError extends BadRequestError {
     constructor(thing: string, url: string, cause?: Error) {
         super(