diff --git a/.travis.yml b/.travis.yml
index 2eb6297..24feb77 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,26 +4,14 @@ branches:
   only:
     - /.*/
 
+php:
+  - '7.2'
+  - '7.3'
+  - '7.4snapshot'
+
 matrix:
-  include:
-    - php: 7.1
-      env:
-        - DEPS=lowest
-    - php: 7.1
-      env:
-        - DEPS=latest
-    - php: 7.2
-      env:
-        - DEPS=lowest
-    - php: 7.2
-      env:
-        - DEPS=latest
-    - php: 7.3
-      env:
-        - DEPS=lowest
-    - php: 7.3
-      env:
-        - DEPS=latest
+  allow_failures:
+    - php: '7.4snapshot'
 
 before_install:
   - phpenv config-rm xdebug.ini || return 0
@@ -31,15 +19,11 @@ before_install:
 install:
   - composer self-update
   - composer install --no-interaction
-  - if [[ $DEPS == 'latest' ]]; then composer update --no-interaction ; fi
-  - if [[ $DEPS == 'lowest' ]]; then composer update --no-interaction --prefer-lowest --prefer-stable ; fi
-  - composer show
 
 script:
   - mkdir build
-  - if [[ $DEPS == 'latest' ]]; then composer ci ; fi
-  - if [[ $DEPS == 'lowest' ]]; then composer test ; fi
+  - composer ci
 
 after_success:
-  - if [[ $DEPS == 'latest' ]]; then wget https://scrutinizer-ci.com/ocular.phar ; fi
-  - if [[ $DEPS == 'latest' ]]; then php ocular.phar code-coverage:upload --format=php-clover build/clover.xml ; fi
+  - wget https://scrutinizer-ci.com/ocular.phar
+  - php ocular.phar code-coverage:upload --format=php-clover build/clover.xml
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d66727f..445ffd7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,15 +4,16 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com), and this project adheres to [Semantic Versioning](https://semver.org).
 
-## [Unreleased]
+## 3.0.0 - 2019-08-20
 
 #### Added
 
-* [#14](https://github.com/acelaya/ze-content-based-error-handler/issues/14) Added PHP 7.3 to build matrix
+* [#14](https://github.com/acelaya/ze-content-based-error-handler/issues/14) and [#19](https://github.com/acelaya/ze-content-based-error-handler/issues/19) Added PHP 7.3 and 7.4 to build matrix
 
 #### Changed
 
-* [#16](https://github.com/acelaya/ze-content-based-error-handler/issues/16) Added compatibility with expressive 3
+* [#16](https://github.com/acelaya/ze-content-based-error-handler/issues/16) Updated dev dependencies
+* [#21](https://github.com/acelaya/ze-content-based-error-handler/issues/21) Updated to coding standard v1.2
 
 #### Deprecated
 
@@ -20,7 +21,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com), and this
 
 #### Removed
 
-* *Nothing*
+* [#18](https://github.com/acelaya/ze-content-based-error-handler/issues/18) Dropped support for PHP 7.1
+* [#20](https://github.com/acelaya/ze-content-based-error-handler/issues/20) Dropped support for Expressive 2
 
 #### Fixed
 
diff --git a/composer.json b/composer.json
index 9439f5f..7860ea3 100644
--- a/composer.json
+++ b/composer.json
@@ -2,6 +2,7 @@
     "name": "acelaya/ze-content-based-error-handler",
     "description": "A Zend Expressive error handler which allows to implement different strategies based on the accepted content-types",
     "type": "library",
+    "license": "MIT",
     "keywords": [
         "expressive",
         "zend",
@@ -10,18 +11,18 @@
         "error handler"
     ],
     "require": {
-        "php": "^7.1",
+        "php": "^7.2",
         "psr/log": "^1.0",
-        "zendframework/zend-expressive": "^3.0 || ^2.1",
+        "zendframework/zend-expressive": "^3.0",
         "zendframework/zend-servicemanager": "^3.0"
     },
     "require-dev": {
-        "infection/infection": "^0.12.0",
-        "phpstan/phpstan": "^0.11.1",
-        "phpunit/phpunit": "^8.0 || ^7.5",
-        "shlinkio/php-coding-standard": "1.0.0"
+        "infection/infection": "^0.13.4",
+        "phpstan/phpstan": "^0.11.15",
+        "phpunit/phpunit": "^8.3",
+        "shlinkio/php-coding-standard": "~1.2.1",
+        "zendframework/zend-diactoros": "^2.1.3"
     },
-    "license": "MIT",
     "authors": [
         {
             "name": "Alejandro Celaya",
@@ -43,20 +44,24 @@
             "@cs",
             "@stan",
             "@test:ci",
-            "@infection:ci"
+            "@infect:ci"
         ],
 
         "cs": "phpcs",
         "cs:fix": "phpcbf",
         "stan": "phpstan analyse src/ --level=6",
 
-        "test": "phpdbg -qrr vendor/bin/phpunit --colors=always",
-        "test:pretty": "phpdbg -qrr vendor/bin/phpunit --coverage-html build/coverage",
-        "test:ci": "phpdbg -qrr vendor/bin/phpunit --colors=always --coverage-clover=build/clover.xml --coverage-xml=build/coverage-xml --log-junit=build/phpunit.junit.xml",
+        "test": "phpdbg -qrr vendor/bin/phpunit --colors=always --testdox",
+        "test:pretty": "phpdbg -qrr vendor/bin/phpunit --coverage-html build/coverage --testdox",
+        "test:ci": "phpdbg -qrr vendor/bin/phpunit --colors=always --coverage-clover=build/clover.xml --coverage-xml=build/coverage-xml --log-junit=build/phpunit.junit.xml --testdox",
 
-        "infection": "phpdbg -qrr vendor/bin/infection --threads=4 --min-msi=80 --log-verbosity=default --only-covered",
-        "infection:ci": "phpdbg -qrr vendor/bin/infection --threads=4 --min-msi=80 --log-verbosity=default --only-covered --coverage=build",
-        "infection:show": "phpdbg -qrr vendor/bin/infection --threads=4 --min-msi=80 --log-verbosity=default --only-covered --show-mutations"
+        "infect": "infection --threads=4 --min-msi=60 --log-verbosity=default --only-covered",
+        "infect:ci": "infection --threads=4 --min-msi=60 --log-verbosity=default --only-covered --coverage=build",
+
+        "infect:test": [
+            "@test:ci",
+            "@infect:ci"
+        ]
     },
     "extra": {
         "zf": {
diff --git a/docker-compose.yml b/docker-compose.yml
index c02bef8..5024be3 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -3,6 +3,6 @@ version: '3'
 services:
   ze_cbeh_php:
     container_name: ze_cbeh_php
-    image: composer:1.8.3
+    image: composer:1.9.0
     volumes:
       - ./:/app
diff --git a/src/ErrorHandler/ContentBasedErrorResponseGenerator.php b/src/ErrorHandler/ContentBasedErrorResponseGenerator.php
index 16565c6..bdaef4f 100644
--- a/src/ErrorHandler/ContentBasedErrorResponseGenerator.php
+++ b/src/ErrorHandler/ContentBasedErrorResponseGenerator.php
@@ -9,6 +9,7 @@
 use Psr\Http\Message\ServerRequestInterface as Request;
 use Psr\Log\LoggerInterface;
 use Throwable;
+
 use function explode;
 use function implode;
 use function sprintf;
diff --git a/src/ErrorHandler/ErrorResponseGeneratorManager.php b/src/ErrorHandler/ErrorResponseGeneratorManager.php
index 81b5926..bcc2156 100644
--- a/src/ErrorHandler/ErrorResponseGeneratorManager.php
+++ b/src/ErrorHandler/ErrorResponseGeneratorManager.php
@@ -5,6 +5,7 @@
 
 use Zend\ServiceManager\AbstractPluginManager;
 use Zend\ServiceManager\Exception\InvalidServiceException;
+
 use function get_class;
 use function gettype;
 use function is_callable;
diff --git a/src/Log/BasicLogMessageBuilder.php b/src/Log/BasicLogMessageBuilder.php
index 76b6ddb..3438b45 100644
--- a/src/Log/BasicLogMessageBuilder.php
+++ b/src/Log/BasicLogMessageBuilder.php
@@ -6,9 +6,11 @@
 use Psr\Http\Message\ResponseInterface as Response;
 use Psr\Http\Message\ServerRequestInterface as Request;
 use Throwable;
-use const PHP_EOL;
+
 use function sprintf;
 
+use const PHP_EOL;
+
 class BasicLogMessageBuilder implements LogMessageBuilderInterface
 {
     /**
@@ -19,7 +21,7 @@ class BasicLogMessageBuilder implements LogMessageBuilderInterface
      * @param \Throwable|null $err
      * @return string
      */
-    public function buildMessage(Request $request, Response $response, Throwable $err = null): string
+    public function buildMessage(Request $request, Response $response, ?Throwable $err = null): string
     {
         $base = 'Error occurred while dispatching request';
         if ($err === null) {
diff --git a/src/Log/LogMessageBuilderInterface.php b/src/Log/LogMessageBuilderInterface.php
index d132352..5ec35bc 100644
--- a/src/Log/LogMessageBuilderInterface.php
+++ b/src/Log/LogMessageBuilderInterface.php
@@ -17,5 +17,5 @@ interface LogMessageBuilderInterface
      * @param \Throwable|null $err
      * @return string
      */
-    public function buildMessage(Request $request, Response $response, Throwable $err = null): string;
+    public function buildMessage(Request $request, Response $response, ?Throwable $err = null): string;
 }
diff --git a/test/Log/BasicLogMessageBuilderTest.php b/test/Log/BasicLogMessageBuilderTest.php
index bc1512c..7bb8063 100644
--- a/test/Log/BasicLogMessageBuilderTest.php
+++ b/test/Log/BasicLogMessageBuilderTest.php
@@ -8,6 +8,7 @@
 use PHPUnit\Framework\TestCase;
 use Zend\Diactoros\Response;
 use Zend\Diactoros\ServerRequestFactory;
+
 use const PHP_EOL;
 
 class BasicLogMessageBuilderTest extends TestCase