diff --git a/.istanbul.yml b/.istanbul.yml
index 72047a7..9b86037 100644
--- a/.istanbul.yml
+++ b/.istanbul.yml
@@ -1,3 +1,2 @@
 instrumentation:
-  default-excludes: false
-  excludes: ["gulpfile.js", "**/test/**", "**/node_modules/!(lib)/**"]
\ No newline at end of file
+  excludes: ["gulpfile.js", "**/lib/api/**"]
\ No newline at end of file
diff --git a/gulpfile.js b/gulpfile.js
index 570b375..15cf6c0 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -17,12 +17,12 @@ gulp.task('quality', function () {
         .pipe(jshint.reporter('default'));
 });
 gulp.task('test', function () {
-    return gulp.src('./test/*.js')
+    return gulp.src('./test/**/*test.js')
         .pipe(mocha({reporter: 'mocha-better-spec-reporter', timeout: '20s'}));
 });
 
 gulp.task('cover', function () {
-    return gulp.src('./test/*.js')
+    return gulp.src('./test/**/*test.js')
         .pipe(mocha({reporter: 'mocha-lcov-reporter', timeout: '120s'}));
 });
 
diff --git a/lib/auth.js b/lib/api/auth.js
similarity index 98%
rename from lib/auth.js
rename to lib/api/auth.js
index 96554fb..c48c057 100644
--- a/lib/auth.js
+++ b/lib/api/auth.js
@@ -5,8 +5,8 @@
 
 
 // Dependencies:
-var api = require('./api');
-var utility = require('./utility');
+var api = require('../api');
+var utility = require('../utility');
 
 
 // ***
diff --git a/lib/contacts.js b/lib/api/contacts.js
similarity index 94%
rename from lib/contacts.js
rename to lib/api/contacts.js
index 2637a23..d9ca544 100644
--- a/lib/contacts.js
+++ b/lib/api/contacts.js
@@ -5,8 +5,8 @@
 
 
 // Dependencies:
-var api = require('./api');
-var utility = require('./utility');
+var api = require('../api');
+var utility = require('../utility');
 
 
 // ***
diff --git a/lib/messages.js b/lib/api/messages.js
similarity index 85%
rename from lib/messages.js
rename to lib/api/messages.js
index 2766776..51d0e3e 100644
--- a/lib/messages.js
+++ b/lib/api/messages.js
@@ -5,8 +5,8 @@
 
 
 // Dependencies:
-var api = require('./api');
-var utility = require('./utility');
+var api = require('../api');
+var utility = require('../utility');
 
 
 // ***
@@ -73,6 +73,19 @@ Messages.prototype.getHistory = function (peer, offset, max_id, limit, callback)
     return utility.callService(api.service.messages.getHistory, this.client, this.client._channel, callback, arguments);
 };
 
+// ***
+// messages.**readHistory(peer, offset, max_id, limit, [callback])**
+
+// Returns a Promise to mark message history as read..
+
+// [Click here for more details](https://core.telegram.org/method/messages.readHistory)
+
+
+// The code:
+Messages.prototype.readHistory = function (peer, offset, max_id, limit, callback) {
+    return utility.callService(api.service.messages.readHistory, this.client, this.client._channel, callback, arguments);
+};
+
 // ***
 // messages.**sendMessage(peer, message, random_id, [callback])**
 
diff --git a/lib/updates.js b/lib/api/updates.js
similarity index 65%
rename from lib/updates.js
rename to lib/api/updates.js
index 3730082..86e74c0 100644
--- a/lib/updates.js
+++ b/lib/api/updates.js
@@ -5,8 +5,8 @@
 
 
 // Dependencies:
-var api = require('./api');
-var utility = require('./utility');
+var api = require('../api');
+var utility = require('../utility');
 
 
 // ***
@@ -41,5 +41,18 @@ Updates.prototype.getState = function (callback) {
     return utility.callService(api.service.updates.getState, this.client, this.client._channel, callback, arguments);
 };
 
+
+// ***
+// updates.**getDifference(pts, date, qts, [callback])**
+
+// Returns a Promise for get the difference between the current state of updates and transmitted.
+
+// [Click here for more details](https://core.telegram.org/method/updates.getDifference)
+
+// The code:
+Updates.prototype.getDifference = function (pts, date, qts, callback) {
+    return utility.callService(api.service.updates.getDifference, this.client, this.client._channel, callback, arguments);
+};
+
 // Exports the class
 module.exports = exports = Updates;
\ No newline at end of file
diff --git a/lib/telegram.link.js b/lib/telegram.link.js
index b038155..264c4a6 100644
--- a/lib/telegram.link.js
+++ b/lib/telegram.link.js
@@ -126,15 +126,16 @@ function Client(app, dataCenter) {
         this._channel = createEncryptedChannel(this._connection, app, app.authKey, NULL_SERVER_SALT);
     }
 
-    // creates the authorization modules bound with the client to call all the API methods
-    // user authorization
-    this.auth = new (require('./auth'))(this);
-    // user contacts
-    this.contacts = new (require('./contacts'))(this);
-    // session updates
-    this.updates = new (require('./updates'))(this);
-    // chat messages
-    this.messages = new (require('./messages'))(this);
+    // User authorization
+    this.auth = new (require('./api/auth'))(this);
+    // User contacts
+    this.contacts = new (require('./api/contacts'))(this);
+    // Session updates
+    this.updates = new (require('./api/updates'))(this);
+    // Chat messages
+    this.messages = new (require('./api/messages'))(this);
+    // Notifications and settings
+    this.account = new (require('./api/account'))(this);
 }
 // Extend the `events.EventEmitter` class
 require('util').inherits(Client, require('events').EventEmitter);
diff --git a/test/auth.test.js b/test/api/auth.test.js
similarity index 100%
rename from test/auth.test.js
rename to test/api/auth.test.js