diff --git a/src/lib/AuthenticationRegulator.ts b/src/lib/AuthenticationRegulator.ts
new file mode 100644
index 00000000..77c121b2
--- /dev/null
+++ b/src/lib/AuthenticationRegulator.ts
@@ -0,0 +1,44 @@
+
+import * as Promise from "bluebird";
+
+const exceptions = require("./exceptions");
+
+const REGULATION_TRACE_TYPE = "regulation";
+const MAX_AUTHENTICATION_COUNT_IN_TIME_RANGE = 3;
+
+interface DatedDocument {
+  date: Date;
+}
+
+export class AuthenticationRegulator {
+  _user_data_store: any;
+  _lock_time_in_seconds: number;
+
+  constructor(user_data_store: any, lock_time_in_seconds: number) {
+    this._user_data_store = user_data_store;
+    this._lock_time_in_seconds = lock_time_in_seconds;
+  }
+
+  // Mark authentication
+  mark(userid: string, is_success: boolean): Promise<void> {
+    return this._user_data_store.save_authentication_trace(userid, REGULATION_TRACE_TYPE, is_success);
+  }
+
+  regulate(userid: string): Promise<void> {
+    return this._user_data_store.get_last_authentication_traces(userid, REGULATION_TRACE_TYPE, false, 3)
+    .then((docs: Array<DatedDocument>) => {
+      if (docs.length < MAX_AUTHENTICATION_COUNT_IN_TIME_RANGE) {
+        // less than the max authorized number of authentication in time range, thus authorizing access
+        return Promise.resolve();
+      }
+
+      const oldest_doc = docs[MAX_AUTHENTICATION_COUNT_IN_TIME_RANGE - 1];
+      const no_lock_min_date = new Date(new Date().getTime() - this._lock_time_in_seconds * 1000);
+      if (oldest_doc.date > no_lock_min_date) {
+        throw new exceptions.AuthenticationRegulationError("Max number of authentication. Please retry in few minutes.");
+      }
+
+      return Promise.resolve();
+    });
+  }
+}
diff --git a/src/lib/authentication_regulator.js b/src/lib/authentication_regulator.js
deleted file mode 100644
index e7e22190..00000000
--- a/src/lib/authentication_regulator.js
+++ /dev/null
@@ -1,35 +0,0 @@
-
-module.exports = AuthenticationRegulator;
-
-var exceptions = require('./exceptions');
-var Promise = require('bluebird');
-
-function AuthenticationRegulator(user_data_store, lock_time_in_seconds) {
-  this._user_data_store = user_data_store;
-  this._lock_time_in_seconds = lock_time_in_seconds;
-}
-
-// Mark authentication
-AuthenticationRegulator.prototype.mark = function(userid, is_success) {
-  return this._user_data_store.save_authentication_trace(userid, '1stfactor', is_success);
-}
-
-AuthenticationRegulator.prototype.regulate = function(userid) {
-  var that = this;
-  return this._user_data_store.get_last_authentication_traces(userid, '1stfactor', false, 3)
-  .then(function(docs) {
-    if(docs.length < 3) {
-      return Promise.resolve();
-    }
-
-    var oldest_doc = docs[2];
-    var no_lock_min_date = new Date(new Date().getTime() - 
-                                    that._lock_time_in_seconds * 1000);
-    
-    if(oldest_doc.date > no_lock_min_date) {
-      throw new exceptions.AuthenticationRegulationError();
-    }
-
-    return Promise.resolve();
-  });
-}
diff --git a/src/lib/server.ts b/src/lib/server.ts
index 279c3fbd..8e6ca8a8 100644
--- a/src/lib/server.ts
+++ b/src/lib/server.ts
@@ -3,10 +3,10 @@ import { authelia } from "../types/authelia";
 import * as Express from "express";
 import * as BodyParser from "body-parser";
 import * as Path from "path";
+import { AuthenticationRegulator } from "./AuthenticationRegulator";
 
 const UserDataStore = require("./user_data_store");
 const Notifier = require("./notifier");
-const AuthenticationRegulator = require("./authentication_regulator");
 const setup_endpoints = require("./setup_endpoints");
 const config_adapter = require("./config_adapter");
 const Ldap = require("./ldap");
diff --git a/src/types/authelia.d.ts b/src/types/authelia.d.ts
index 9b222356..94950cbb 100644
--- a/src/types/authelia.d.ts
+++ b/src/types/authelia.d.ts
@@ -3,7 +3,6 @@ import * as winston from "winston";
 import * as nedb from "nedb";
 
 declare namespace authelia {
-
     interface LdapConfiguration {
         url: string;
         base_dn: string;
diff --git a/test/unitary/test_authentication_regulator.js b/test/unitary/AuthenticationRegulator.test.js
similarity index 86%
rename from test/unitary/test_authentication_regulator.js
rename to test/unitary/AuthenticationRegulator.test.js
index 18b46c9e..c06e91e2 100644
--- a/test/unitary/test_authentication_regulator.js
+++ b/test/unitary/AuthenticationRegulator.test.js
@@ -1,11 +1,12 @@
 
-var AuthenticationRegulator = require('../../src/lib/authentication_regulator');
-var UserDataStore = require('../../src/lib/user_data_store');
-var DataStore = require('nedb');
+import { AuthenticationRegulator } from "../../src/lib/AuthenticationRegulator";
+import * as UserDataStore from "../../src/lib/user_data_store";
+import * as DataStore from "nedb";
+import * as MockDate from "mockdate";
+
 var exceptions = require('../../src/lib/exceptions');
-var MockDate = require('mockdate');
 
-describe('test authentication regulator', function() {
+describe.only('test authentication regulator', function() {
   it('should mark 2 authentication and regulate (resolve)', function() {
     var options = {};
     options.inMemoryOnly = true;
diff --git a/test/unitary/config_adapter.test.ts b/test/unitary/config_adapter.test.ts
index 3db5cd58..51a4eef9 100644
--- a/test/unitary/config_adapter.test.ts
+++ b/test/unitary/config_adapter.test.ts
@@ -1,4 +1,3 @@
-import * as mocha from "mocha";
 import * as Assert from "assert";
 
 const config_adapter = require("../../src/lib/config_adapter");