diff --git a/composer.json b/composer.json
index e23db94..5a33e6d 100644
--- a/composer.json
+++ b/composer.json
@@ -25,7 +25,7 @@
         "php": ">=7.2",
         "ext-json": "*",
         "adbario/php-dot-notation": "~2.2",
-        "monolog/monolog": "~1.21",
+        "monolog/monolog": "^2.0",
         "zendframework/zend-diactoros": "1.8.6"
     },
     "autoload": {
diff --git a/composer.lock b/composer.lock
index aa8ba82..0ec10e3 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": "46dadc1dde984916786e8bfdc9cf7e22",
+    "content-hash": "18ce6b45b089d946bbb28cdb1a8ef0fd",
     "packages": [
         {
             "name": "adbario/php-dot-notation",
@@ -57,21 +57,21 @@
         },
         {
             "name": "monolog/monolog",
-            "version": "1.25.1",
+            "version": "2.0.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/Seldaek/monolog.git",
-                "reference": "70e65a5470a42cfec1a7da00d30edb6e617e8dcf"
+                "reference": "68545165e19249013afd1d6f7485aecff07a2d22"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/Seldaek/monolog/zipball/70e65a5470a42cfec1a7da00d30edb6e617e8dcf",
-                "reference": "70e65a5470a42cfec1a7da00d30edb6e617e8dcf",
+                "url": "https://api.github.com/repos/Seldaek/monolog/zipball/68545165e19249013afd1d6f7485aecff07a2d22",
+                "reference": "68545165e19249013afd1d6f7485aecff07a2d22",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.3.0",
-                "psr/log": "~1.0"
+                "php": "^7.2",
+                "psr/log": "^1.0.1"
             },
             "provide": {
                 "psr/log-implementation": "1.0.0"
@@ -79,33 +79,36 @@
             "require-dev": {
                 "aws/aws-sdk-php": "^2.4.9 || ^3.0",
                 "doctrine/couchdb": "~1.0@dev",
-                "graylog2/gelf-php": "~1.0",
-                "jakub-onderka/php-parallel-lint": "0.9",
+                "elasticsearch/elasticsearch": "^6.0",
+                "graylog2/gelf-php": "^1.4.2",
+                "jakub-onderka/php-parallel-lint": "^0.9",
                 "php-amqplib/php-amqplib": "~2.4",
                 "php-console/php-console": "^3.1.3",
-                "phpunit/phpunit": "~4.5",
-                "phpunit/phpunit-mock-objects": "2.3.0",
+                "phpspec/prophecy": "^1.6.1",
+                "phpunit/phpunit": "^8.3",
+                "predis/predis": "^1.1",
+                "rollbar/rollbar": "^1.3",
                 "ruflin/elastica": ">=0.90 <3.0",
-                "sentry/sentry": "^0.13",
                 "swiftmailer/swiftmailer": "^5.3|^6.0"
             },
             "suggest": {
                 "aws/aws-sdk-php": "Allow sending log messages to AWS services like DynamoDB",
                 "doctrine/couchdb": "Allow sending log messages to a CouchDB server",
+                "elasticsearch/elasticsearch": "Allow sending log messages to an Elasticsearch server via official client",
                 "ext-amqp": "Allow sending log messages to an AMQP server (1.0+ required)",
-                "ext-mongo": "Allow sending log messages to a MongoDB server",
+                "ext-mbstring": "Allow to work properly with unicode symbols",
+                "ext-mongodb": "Allow sending log messages to a MongoDB server (via driver)",
                 "graylog2/gelf-php": "Allow sending log messages to a GrayLog2 server",
-                "mongodb/mongodb": "Allow sending log messages to a MongoDB server via PHP Driver",
+                "mongodb/mongodb": "Allow sending log messages to a MongoDB server (via library)",
                 "php-amqplib/php-amqplib": "Allow sending log messages to an AMQP server using php-amqplib",
                 "php-console/php-console": "Allow sending log messages to Google Chrome",
                 "rollbar/rollbar": "Allow sending log messages to Rollbar",
-                "ruflin/elastica": "Allow sending log messages to an Elastic Search server",
-                "sentry/sentry": "Allow sending log messages to a Sentry server"
+                "ruflin/elastica": "Allow sending log messages to an Elastic Search server"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "2.0.x-dev"
+                    "dev-master": "2.x-dev"
                 }
             },
             "autoload": {
@@ -131,7 +134,7 @@
                 "logging",
                 "psr-3"
             ],
-            "time": "2019-09-06T13:49:17+00:00"
+            "time": "2019-08-30T09:56:44+00:00"
         },
         {
             "name": "psr/http-message",