diff --git a/lib/classes/Session.ts b/lib/classes/Session.ts
index 91e1e4a..f3fc3f0 100644
--- a/lib/classes/Session.ts
+++ b/lib/classes/Session.ts
@@ -1,5 +1,5 @@
 export default class Session {
-  public user_id: number;
-  public user_name: string;
-  public permissions: Array<string>;
+  public user_id?: number;
+  public user_name?: string;
+  public permissions?: Array<string>;
 }
diff --git a/lib/classes/Status.ts b/lib/classes/Status.ts
index ffae8cb..b84841b 100644
--- a/lib/classes/Status.ts
+++ b/lib/classes/Status.ts
@@ -9,7 +9,7 @@ export default class Status {
     return this._status;
   }
 
-  public set status (value: number): void {
+  public set status (value: number) {
     this._status = value;
   }
 
diff --git a/lib/classes/Transaction.ts b/lib/classes/Transaction.ts
index 75e035f..7612f3e 100644
--- a/lib/classes/Transaction.ts
+++ b/lib/classes/Transaction.ts
@@ -1,4 +1,4 @@
-import { Request, Response } from '@types/express';
+import { Request, Response } from 'express';
 import Status from './Status';
 import Session from './Session';
 
@@ -12,7 +12,7 @@ export default class Transaction {
   public get req (): Request { return this._req; }
   public get res (): Response { return this._res; }
   public get status (): Status { return this._status; }
-  public session: Session;
+  public session?: Session;
 
   /* constructor */
   public constructor (req: Request, res: Response) {
@@ -22,8 +22,8 @@ export default class Transaction {
   }
 
   /* methods */
-  public finalize (): void {
-    if (this._status.has_status ())
+  public finalize (data: any): void {
+    if (this._status.has_status)
       this._res.status (this.status.status);
     this._res.end (data);
   }
diff --git a/lib/index.ts b/lib/index.ts
index 7529893..98522a2 100644
--- a/lib/index.ts
+++ b/lib/index.ts
@@ -1,4 +1,4 @@
-import { App } from '@types/express';
+import { App } from 'express';
 import Handler from './classes/Handler';
 
 /**
@@ -9,13 +9,13 @@ import Handler from './classes/Handler';
  */
 export default function load_handlers (
   app: App,
-  handlers: array<Handler>
+  handlers: Array<Handler>
 ): void {
   for (const h of handlers)
     app.use (h.path, h.run_http_handler);
 }
 
-export * from './classes/Session.ts';
-export * from './classes/Status.ts';
-export * from './classes/Transaction.ts';
-export * from './classes/Handler.ts';
+export * from './classes/Session';
+export * from './classes/Status';
+export * from './classes/Transaction';
+export * from './classes/Handler';