diff --git a/.env.example b/.env.example
index 030bf24..169df2c 100644
--- a/.env.example
+++ b/.env.example
@@ -11,6 +11,8 @@ INDEX_MESSAGE="Welcome to i-c-a.su client for telegram. \nIf you have questions
 # TELEGRAM CLIENT
 TELEGRAM_API_ID=
 TELEGRAM_API_HASH=
+# ERROR = 1; WARNING = 2; const NOTICE = 3; VERBOSE = 4; ULTRA_VERBOSE = 5;
+LOGGER_LEVEL=3
 
 # TELEGRAM SOCKS5 PROXY (optional)
 TELEGRAM_PROXY_ADDRESS=
diff --git a/composer.json b/composer.json
index 0f7d8f7..ba7805e 100644
--- a/composer.json
+++ b/composer.json
@@ -9,7 +9,7 @@
     "php": ">=7.2.0",
     "ext-json": "*",
     "ext-swoole": ">=4.1",
-    "danog/madelineproto":"dev-master",
+    "danog/madelineproto":"dev-session_optimization",
     "amphp/dns": "dev-master as 0.9.9",
     "amphp/file": "dev-master as 0.3.3",
     "amphp/uri": "dev-master as 0.1.3",
diff --git a/composer.lock b/composer.lock
index fe67ad2..9eea0a1 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "308dc823c837683776469789ec856985",
+    "content-hash": "fde6d73b5cdc03736a0e1f0268c330b0",
     "packages": [
         {
             "name": "amphp/amp",
@@ -1045,11 +1045,11 @@
         },
         {
             "name": "danog/madelineproto",
-            "version": "dev-master",
+            "version": "dev-session_optimization",
             "source": {
                 "type": "git",
                 "url": "https://github.com/xtrime-ru/MadelineProto.git",
-                "reference": "d18d97d208ef7d39e73cd117b55efc2208dd7819"
+                "reference": "694d092ade9a8af0d32d58579c3a7d52df1b2537"
             },
             "require": {
                 "amphp/amp": "^2.0",
@@ -1121,7 +1121,7 @@
                 "telegram",
                 "video"
             ],
-            "time": "2019-05-13T16:06:16+00:00"
+            "time": "2019-05-14T22:27:21+00:00"
         },
         {
             "name": "danog/magicalserializer",
diff --git a/config.php b/config.php
index ab9945e..d2dc0c8 100644
--- a/config.php
+++ b/config.php
@@ -18,7 +18,7 @@ return [
         ],
         'logger' => [ // Logger settings
             'logger' => 3, //  0 - Logs disabled, 3 - echo logs.
-            'logger_level' => \danog\MadelineProto\Logger::FATAL_ERROR, // Logging level, available logging levels are: ULTRA_VERBOSE - 0, VERBOSE - 1 , NOTICE - 2, WARNING - 3, ERROR - 4, FATAL_ERROR - 5.
+            'logger_level' => (int) getenv('LOGGER_LEVEL'), // Logging level, available logging levels are: ULTRA_VERBOSE - 0, VERBOSE - 1 , NOTICE - 2, WARNING - 3, ERROR - 4, FATAL_ERROR - 5.
         ],
         'updates' => [
             'handle_updates' => false, // Should I handle updates?