diff --git a/lib/classes/Handler.ts b/lib/classes/Handler.ts
index 43d6de9..3c1323a 100644
--- a/lib/classes/Handler.ts
+++ b/lib/classes/Handler.ts
@@ -1,5 +1,5 @@
-import { Request, Response } from '@types/express/index.d.ts';
-import Transaction from './Transaction.ts';
+import { Request, Response } from '@types/express';
+import Transaction from './Transaction';
 
 export default abstract class Handler {
   private _handlers: array<Function> = [];
diff --git a/lib/classes/status.ts b/lib/classes/Status.ts
similarity index 100%
rename from lib/classes/status.ts
rename to lib/classes/Status.ts
diff --git a/lib/classes/transaction.ts b/lib/classes/Transaction.ts
similarity index 82%
rename from lib/classes/transaction.ts
rename to lib/classes/Transaction.ts
index 02254d8..75e035f 100644
--- a/lib/classes/transaction.ts
+++ b/lib/classes/Transaction.ts
@@ -1,6 +1,6 @@
-import { Request, Response } from '@types/express/index.d.ts';
-import Status from './Status.ts';
-import Session from './Session.ts';
+import { Request, Response } from '@types/express';
+import Status from './Status';
+import Session from './Session';
 
 export default class Transaction {
   /* private */
diff --git a/lib/index.ts b/lib/index.ts
index 9d259c7..7529893 100644
--- a/lib/index.ts
+++ b/lib/index.ts
@@ -1,5 +1,5 @@
-import { App } from '@types/express/index.d.ts';
-import Handler from './classes/Handler.ts';
+import { App } from '@types/express';
+import Handler from './classes/Handler';
 
 /**
  * register an array of handlers to an express app
diff --git a/package.json b/package.json
index a4f7094..23d8054 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "main": "dist/index.js",
   "scripts": {
     "test": "nyc ava",
-    "lint": "eslint .",
+    "lint": "eslint . --ext .js,.jsx,.ts,.tsx,.vue,.mjs",
     "ci": "yarn --frozen-lockfile && node jenkins.js",
     "mutate": "stryker run"
   },
@@ -22,6 +22,7 @@
     "node": ">=10.0.0"
   },
   "devDependencies": {
+    "@ava/typescript": "^1.1.1",
     "@scode/eslint-config-ts": "^1.0.12",
     "@stryker-mutator/core": "^3.1.0",
     "@stryker-mutator/javascript-mutator": "^3.1.0",
diff --git a/test/.eslintrc.js b/test/.eslintrc.js
new file mode 100644
index 0000000..5ef8f14
--- /dev/null
+++ b/test/.eslintrc.js
@@ -0,0 +1,17 @@
+/*
+ * Copyright (C) Sapphirecode - All Rights Reserved
+ * This file is part of Requestor which is released under BSD-3-Clause.
+ * See file 'LICENSE' for full license details.
+ * Created by Timo Hocker <timo@scode.ovh>, March 2020
+ */
+
+module.exports = {
+  env: {
+    commonjs: true,
+    es6: true,
+    node: true
+  },
+  extends: [
+    '@scode/eslint-config-ts'
+  ]
+}
diff --git a/test/main.ts b/test/main.ts
new file mode 100644
index 0000000..9361110
--- /dev/null
+++ b/test/main.ts
@@ -0,0 +1,5 @@
+import test from 'ava';
+
+test ('testing', (t) => {
+  t.is (true, true);
+});
diff --git a/yarn.lock b/yarn.lock
index 9deb7f9..c0400cc 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2,6 +2,13 @@
 # yarn lockfile v1
 
 
+"@ava/typescript@^1.1.1":
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/@ava/typescript/-/typescript-1.1.1.tgz#3dcaba3aced8026fdb584d927d809752854dc6e6"
+  integrity sha512-KbLUAe2cWXK63WLK6LnOJonjwEDU/8MNXCOA1ooX/YFZgKRmeAD1kZu+2K0ks5fnOCEcckNQAooyBNGdZUmMQA==
+  dependencies:
+    escape-string-regexp "^2.0.0"
+
 "@babel/code-frame@^7.0.0", "@babel/code-frame@^7.8.3":
   version "7.8.3"
   resolved "https://registry.yarnpkg.com/@babel/code-frame/-/code-frame-7.8.3.tgz#33e25903d7481181534e12ec0a25f16b6fcf419e"
@@ -256,17 +263,17 @@
   integrity sha512-T2YeiJIiok+LDpsTh6/IVLxCl8/NyHOM0zeyeoo54TR1Dwp0M1u0CI38vua0S1GGuyPo+l5KLGl5lQjvx7++Ng==
 
 "@scode/eslint-config-es6@^1.0.1":
-  version "1.0.12"
-  resolved "https://npm.scode.ovh/@scode%2feslint-config-es6/-/eslint-config-es6-1.0.12.tgz#c2a983b6ea82ac5c815ed5e2b6710f0abbf786d9"
-  integrity sha512-Qd0HoZ3AJa1NfDlI+m/60UNvWEW9lfqX/I0sJ8S6zAhwMHO4ETjE5wTPJJFKRt4zrLmTxFiA+qAElaYSP+aaiQ==
+  version "1.0.14"
+  resolved "https://npm.scode.ovh/@scode%2feslint-config-es6/-/eslint-config-es6-1.0.14.tgz#3b1f023b6ac653e29eb12f1ce4ec9103e0066be0"
+  integrity sha512-uVSO52wbpoynUBFI6nkRh5d5DD1Pqto7Alic9cr5WEyDF6ihScy0bTQBrdRGHRHVlvMYrVCNNK9gRvSwPdjatA==
   dependencies:
     "@scode/eslint-config" "^2.0.1"
     eslint-plugin-import "^2.20.1"
 
 "@scode/eslint-config-ts@^1.0.12":
-  version "1.0.12"
-  resolved "https://npm.scode.ovh/@scode%2feslint-config-ts/-/eslint-config-ts-1.0.12.tgz#d6779d41a804b4c47e8878a73fce98ac473bfd99"
-  integrity sha512-vo5cuc7sggDakWC1xDMF+7m5OaQl1kOHMIFA0w3B3YD3JOP6mVLBozT2f1CgYV3umfm2JBva6LUiHv0yY4UVOA==
+  version "1.0.13"
+  resolved "https://npm.scode.ovh/@scode%2feslint-config-ts/-/eslint-config-ts-1.0.13.tgz#0c58638617217b4907949e8ff601608703ca9c7b"
+  integrity sha512-mfrby0ffIlEAYG03L/JIsKphyM+Wa7jyEESGN8pcHtw/sBMxGijzLfaxpYdzGn6GcYHSlsD1TG8CUt65+RGtCw==
   dependencies:
     "@scode/eslint-config-es6" "^1.0.1"
     "@typescript-eslint/eslint-plugin" "^2.26.0"
@@ -421,9 +428,9 @@
   integrity sha512-tHq6qdbT9U1IRSGf14CL0pUlULksvY9OZ+5eEgl1N7t+OA3tGvNpxJCzuKQlsNgCVwbAs670L1vcVQi8j9HjnA==
 
 "@types/node@*":
-  version "13.11.0"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-13.11.0.tgz#390ea202539c61c8fa6ba4428b57e05bc36dc47b"
-  integrity sha512-uM4mnmsIIPK/yeO+42F2RQhGUIs39K2RFmugcJANppXe6J1nvH87PvzPZYpza7Xhhs8Yn9yIAVdLZ84z61+0xQ==
+  version "13.11.1"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-13.11.1.tgz#49a2a83df9d26daacead30d0ccc8762b128d53c7"
+  integrity sha512-eWQGP3qtxwL8FGneRrC5DwrJLGN4/dH1clNTuLfN81HCrxVtxRjygDTUoZJ5ASlDEeo0ppYFQjQIlXhtXpOn6g==
 
 "@types/normalize-package-data@^2.4.0":
   version "2.4.0"