diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
new file mode 100644
index 0000000..811a793
--- /dev/null
+++ b/.github/workflows/run-tests.yml
@@ -0,0 +1,74 @@
+name: Run tests
+
+on:
+  push:
+  schedule:
+    - cron: '0 0 * * *'
+
+jobs:
+  php-tests:
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      matrix:
+        php: [7.4, 7.3, 7.2]
+        laravel: [6.*, 5.8.*, 5.7.*, 5.6.*]
+        os: [ubuntu-latest]
+        include:
+          - laravel: 6.*
+            testbench: 4.*
+          - laravel: 5.8.*
+            testbench: 3.8.*
+          - laravel: 5.7.*
+            testbench: 3.7.*
+          - laravel: 5.6.*
+            testbench: 3.6.*
+        exclude:
+          - laravel: 5.7.*
+            php: 7.4
+          - laravel: 5.6.*
+            php: 7.4
+          - laravel: 5.5.*
+            php: 7.4
+
+    name: PHP ${{ matrix.php }} - Laravel ${{ matrix.laravel }}
+
+    services:
+      mysql:
+        image: mysql:5.7.27
+        env:
+          MYSQL_USER: root
+          MYSQL_ROOT_PASSWORD: root
+          MYSQL_PASSWORD:
+          MYSQL_ALLOW_EMPTY_PASSWORD: true
+          MYSQL_DATABASE: test
+        ports:
+          - 3307:3306
+        volumes:
+          - $HOME/mysql:/var/lib/mysql
+        options: --health-cmd="mysqladmin ping" --health-interval=10s --health-timeout=5s --health-retries=3
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v1
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v1
+        with:
+          php-version: ${{ matrix.php }}
+          extensions: mbstring, dom, fileinfo, mysql
+          coverage: none
+
+      - name: Install dependencies
+        run: |
+          composer require "laravel/framework:${{ matrix.laravel }}" "orchestra/testbench:${{ matrix.testbench }}" --no-interaction --no-update
+          composer update --prefer-stable --prefer-dist --no-interaction --no-suggest
+      - name: Execute tests
+        env:
+          CI_DB_DRIVER: mysql
+          CI_DB_HOST: 127.0.0.1
+          CI_DB_PORT: 3307
+          CI_DB_DATABASE: test
+          CI_DB_USERNAME: root
+          CI_DB_PASSWORD: root
+        run: vendor/bin/phpunit
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
index b3aec00..4218a0b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 vendor/
 .DS_Store
 composer.lock
+.phpunit.result.cache
\ No newline at end of file
diff --git a/.styleci.yml b/.styleci.yml
deleted file mode 100644
index 6894532..0000000
--- a/.styleci.yml
+++ /dev/null
@@ -1,7 +0,0 @@
-preset: laravel
-
-enabled:
-  - concat_with_spaces
-
-disabled:
-  - concat_without_spaces
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 545e6f9..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,35 +0,0 @@
-language: php
-
-sudo: false
-
-services:
-  - mysql
-
-matrix:
-  fast_finish: true
-  include:
-    # SQLite
-    - php: 7.0
-      env: CI_DB_DRIVER="sqlite" CI_DB_DATABASE=":memory:"
-    - php: 7.1
-      env: CI_DB_DRIVER="sqlite" CI_DB_DATABASE=":memory:"
-    # MySQL 5.7
-    - php: 7.0
-      env: CI_DB_DRIVER="mysql" CI_DB_HOST="127.0.0.1" CI_DB_DATABASE="travis" CI_DB_USERNAME="root"
-    - php: 7.1
-      env: CI_DB_DRIVER="mysql" CI_DB_HOST="127.0.0.1" CI_DB_DATABASE="travis" CI_DB_USERNAME="root"
-    # MariaDB
-    - php: 7.0
-      env: CI_DB_DRIVER="mysql" CI_DB_HOST="127.0.0.1" CI_DB_DATABASE="travis" CI_DB_USERNAME="root"
-      addons:
-        mariadb: 10.0
-    - php: 7.1
-      env: CI_DB_DRIVER="mysql" CI_DB_HOST="127.0.0.1" CI_DB_DATABASE="travis" CI_DB_USERNAME="root"
-      addons:
-        mariadb: 10.0
-
-install: travis_retry composer install --no-interaction --prefer-source
-
-script:
-  - mysql --version
-  - vendor/bin/phpunit --verbose
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 953843e..1037001 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## 4.1.1 - 2020-01-11
+
+**Fixed**
+
+- Fixed inline attachments could not be stored
+- Fixed PHP 7.4 issue when reading empty Mailable from address
+
 ## 4.1.0 - 2019-07-13
 
 **Added**
diff --git a/README.md b/README.md
index 98a5d9c..8d1ae45 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
   <img src="/logo.png">
 </p>
 <p align="center">
-<a href="https://travis-ci.org/stackkit/laravel-database-emails"><img src="https://travis-ci.org/stackkit/laravel-database-emails.svg?branch=master" alt="Build Status"></a>
+<img src="https://github.com/marickvantuil/laravel-database-emails/workflows/Run tests/badge.svg" alt="Build Status">
 <a href="https://packagist.org/packages/stackkit/laravel-database-emails"><img src="https://poser.pugx.org/stackkit/laravel-database-emails/v/stable.svg" alt="Latest Stable Version"></a>
 <a href="https://packagist.org/packages/stackkit/laravel-database-emails"><img src="https://poser.pugx.org/stackkit/laravel-database-emails/license.svg" alt="License"></a>
 </p>
diff --git a/composer.json b/composer.json
index 1e4e728..c505a69 100644
--- a/composer.json
+++ b/composer.json
@@ -25,14 +25,13 @@
             ]
         }
     },
+    "require": {
+        "ext-json": "*"
+    },
     "require-dev": {
-        "illuminate/database": "5.5.*",
-        "illuminate/console": "5.5.*",
-        "illuminate/validation": "5.5.*",
-        "orchestra/testbench": "^3.5",
-        "orchestra/database": "^3.5",
-        "phpunit/phpunit": "^6.0",
-        "mockery/mockery": "^1.0",
-        "dompdf/dompdf": "^0.8.2"
+        "mockery/mockery": "^1.2",
+        "orchestra/testbench": "^3.5 || ^3.6 || ^3.7 || ^3.8 || ^4.0",
+        "symfony/console": "^4.4",
+        "tecnickcom/tcpdf": "^6.3"
     }
 }
diff --git a/src/HasEncryptedAttributes.php b/src/HasEncryptedAttributes.php
index ce782ac..a73984d 100644
--- a/src/HasEncryptedAttributes.php
+++ b/src/HasEncryptedAttributes.php
@@ -32,7 +32,6 @@ trait HasEncryptedAttributes
         'cc',
         'bcc',
         'variables',
-        'attachments',
     ];
 
     /**
@@ -61,6 +60,25 @@ public function getAttribute($key)
             }
         }
 
+        // BC fix for attachments in 4.1.0 and lower.
+        // Attachments were stored json encoded.
+        // Because this doesn't work for raw attachments, value is now serialized.
+        // Check if value is json encoded or serialized, and decode or unserialize accordingly.
+        if ($key == 'attachments') {
+            if (substr($value, 0, 2) === 'a:') {
+                $unserialized = @unserialize($value);
+                if ($value !== false) {
+                    $value = $unserialized;
+                }
+            } else {
+                $decoded = json_decode($value, true);
+
+                if (! is_null($decoded)) {
+                    $value = $decoded;
+                }
+            }
+        }
+
         return $value;
     }
 }
diff --git a/src/MailableReader.php b/src/MailableReader.php
index a8f35da..38c4872 100644
--- a/src/MailableReader.php
+++ b/src/MailableReader.php
@@ -68,6 +68,10 @@ private function readFrom(EmailComposer $composer)
     {
         $from = reset($composer->getData('mailable')->from);
 
+        if (!$from) {
+            return;
+        }
+
         $composer->from(
             $from['address'],
             $from['name']
diff --git a/src/Preparer.php b/src/Preparer.php
index b4e98fd..e2fba6b 100644
--- a/src/Preparer.php
+++ b/src/Preparer.php
@@ -198,7 +198,7 @@ private function prepareAttachments(EmailComposer $composer)
         }
 
         $composer->getEmail()->fill([
-            'attachments' => json_encode($attachments),
+            'attachments' => serialize($attachments),
         ]);
     }
 
diff --git a/tests/DatabaseInteractionTest.php b/tests/DatabaseInteractionTest.php
index 2f65045..034fc4c 100644
--- a/tests/DatabaseInteractionTest.php
+++ b/tests/DatabaseInteractionTest.php
@@ -2,8 +2,9 @@
 
 namespace Tests;
 
-use Dompdf\Dompdf;
+use Carbon\Carbon;
 use Illuminate\Support\Facades\DB;
+use TCPDF;
 
 class DatabaseInteractionTest extends TestCase
 {
@@ -85,9 +86,10 @@ public function scheduled_date_should_be_saved_correctly()
         $this->assertNull(DB::table('emails')->find(1)->scheduled_at);
         $this->assertNull($email->getScheduledDate());
 
+        Carbon::setTestNow(Carbon::create(2019, 1, 1, 1, 2, 3));
         $email = $this->scheduleEmail('+2 weeks');
         $this->assertNotNull(DB::table('emails')->find(2)->scheduled_at);
-        $this->assertEquals(date('Y-m-d H:i:s', strtotime('+2 weeks')), $email->getScheduledDate());
+        $this->assertEquals('2019-01-15 01:02:03', $email->getScheduledDate());
     }
 
     /** @test */
@@ -156,7 +158,9 @@ public function attempts_should_be_zero()
     /** @test */
     public function the_scheduled_date_should_be_saved_correctly()
     {
-        $scheduledFor = date('Y-m-d H:i:s', strtotime('+2 weeks'));
+        Carbon::setTestNow(Carbon::now());
+
+        $scheduledFor = date('Y-m-d H:i:s', Carbon::now()->addWeek(2)->timestamp);
 
         $email = $this->scheduleEmail('+2 weeks');
 
@@ -205,12 +209,13 @@ public function attachments_should_be_saved_correctly()
     /** @test */
     public function in_memory_attachments_should_be_saved_correctly()
     {
-        $pdf = new Dompdf;
-        $pdf->loadHtml('Hello CI!');
-        $pdf->setPaper('A4', 'landscape');
+        $pdf = new TCPDF;
+        $pdf->Write(0, 'Hello CI!');
+
+        $rawData = $pdf->Output('generated.pdf', 'S');
 
         $email = $this->composeEmail()
-            ->attachData($pdf->outputHtml(), 'generated.pdf', [
+            ->attachData($rawData, 'generated.pdf', [
                 'mime' => 'application/pdf',
             ])
             ->send();
@@ -218,6 +223,6 @@ public function in_memory_attachments_should_be_saved_correctly()
         $this->assertCount(1, $email->getAttachments());
 
         $this->assertEquals('rawAttachment', $email->getAttachments()[0]['type']);
-        $this->assertEquals($pdf->outputHtml(), $email->getAttachments()[0]['attachment']['data']);
+        $this->assertEquals(md5($rawData), md5($email->getAttachments()[0]['attachment']['data']));
     }
 }
diff --git a/tests/EncryptionTest.php b/tests/EncryptionTest.php
index c4087e2..d023c88 100644
--- a/tests/EncryptionTest.php
+++ b/tests/EncryptionTest.php
@@ -4,7 +4,7 @@
 
 class EncryptionTest extends TestCase
 {
-    public function setUp()
+    public function setUp(): void
     {
         parent::setUp();
 
diff --git a/tests/SendEmailsCommandTest.php b/tests/SendEmailsCommandTest.php
index fbbf3fd..21770bd 100644
--- a/tests/SendEmailsCommandTest.php
+++ b/tests/SendEmailsCommandTest.php
@@ -37,7 +37,9 @@ public function an_email_should_not_be_sent_once_it_is_marked_as_sent()
 
         $this->artisan('email:send');
 
-        $this->assertEquals($firstSend = date('Y-m-d H:i:s'), $email->fresh()->getSendDate());
+        $this->assertNotNull($firstSend = $email->fresh()->getSendDate());
+
+        sleep(1);
 
         $this->artisan('email:send');
 
@@ -55,7 +57,7 @@ public function if_an_email_fails_to_be_sent_it_should_be_logged_in_the_database
         $this->artisan('email:send');
 
         $this->assertTrue($email->fresh()->hasFailed());
-        $this->assertContains('Driver [does-not-exist] not supported.', $email->fresh()->getError());
+        $this->assertStringContains('Driver [does-not-exist] not supported.', $email->fresh()->getError());
     }
 
     /** @test */
diff --git a/tests/SenderTest.php b/tests/SenderTest.php
index cd16a0e..9d9f54d 100644
--- a/tests/SenderTest.php
+++ b/tests/SenderTest.php
@@ -2,18 +2,17 @@
 
 namespace Tests;
 
-use Dompdf\Dompdf;
 use Swift_Events_SendEvent;
 use Illuminate\Support\Facades\Mail;
 use Stackkit\LaravelDatabaseEmails\Email;
-use Stackkit\LaravelDatabaseEmails\Config;
+use TCPDF;
 
 class SenderTest extends TestCase
 {
     /** @var Swift_Events_SendEvent[] */
     public $sent = [];
 
-    public function setUp()
+    public function setUp(): void
     {
         parent::setUp();
 
@@ -194,12 +193,13 @@ public function attachments_are_not_added_if_the_data_is_not_valid()
     /** @test */
     public function raw_attachments_are_added_to_the_email()
     {
-        $pdf = new Dompdf;
-        $pdf->loadHtml('Hello CI!');
-        $pdf->setPaper('A4');
+        $pdf = new TCPDF;
+        $pdf->Write(0, 'Hello CI!');
+
+        $rawData = $pdf->Output('generated.pdf', 'S');
 
         $this->composeEmail()
-            ->attachData($pdf->outputHtml(), 'hello-ci.pdf', [
+            ->attachData($rawData, 'hello-ci.pdf', [
                 'mime' => 'application/pdf',
             ])
             ->send();
@@ -211,7 +211,22 @@ public function raw_attachments_are_added_to_the_email()
         $this->assertCount(1, $attachments);
         $this->assertEquals('attachment; filename=hello-ci.pdf', $attachment->getHeaders()->get('content-disposition')->getFieldBody());
         $this->assertEquals('application/pdf', $attachment->getContentType());
-        $this->assertContains('Hello CI!', $attachment->getBody());
+        $this->assertTrue(md5($attachment->getBody()) == md5($rawData));
+    }
+
+    /** @test */
+    public function old_json_encoded_attachments_can_still_be_read()
+    {
+        $email = $this->sendEmail();
+        $email->attachments = json_encode([1, 2, 3]);
+        $email->save();
+
+        $this->assertEquals([1, 2, 3], $email->fresh()->getAttachments());
+
+        $email->attachments = serialize([4, 5, 6]);
+        $email->save();
+
+        $this->assertEquals([4, 5, 6], $email->fresh()->getAttachments());
     }
 
     /** @test */
diff --git a/tests/TestCase.php b/tests/TestCase.php
index 1e7aa16..1565e14 100644
--- a/tests/TestCase.php
+++ b/tests/TestCase.php
@@ -9,7 +9,7 @@ class TestCase extends \Orchestra\Testbench\TestCase
 {
     protected $invalid;
 
-    public function setUp()
+    public function setUp(): void
     {
         parent::setUp();
 
@@ -25,10 +25,10 @@ function () {
             },
         ];
 
-        $this->loadMigrationsFrom(__DIR__ . '/../database/migrations');
-
         view()->addNamespace('tests', __DIR__ . '/views');
 
+        $this->loadMigrationsFrom(__DIR__ . '/../database/migrations');
+
         Email::truncate();
     }
 
@@ -65,7 +65,6 @@ protected function schema()
     protected function getPackageProviders($app)
     {
         return [
-            \Orchestra\Database\ConsoleServiceProvider::class,
             \Stackkit\LaravelDatabaseEmails\LaravelDatabaseEmailsServiceProvider::class,
         ];
     }
@@ -86,6 +85,7 @@ protected function getEnvironmentSetUp($app)
         $app['config']->set('database.connections.testbench', [
             'driver'   => getenv('CI_DB_DRIVER'),
             'host'     => getenv('CI_DB_HOST'),
+            'port'     => getenv('CI_DB_PORT'),
             'database' => getenv('CI_DB_DATABASE'),
             'username' => getenv('CI_DB_USERNAME'),
             'password' => getenv('CI_DB_PASSWORD'),
@@ -130,4 +130,13 @@ public function scheduleEmail($scheduledFor, $overwrite = [])
     {
         return $this->createEmail($overwrite)->schedule($scheduledFor);
     }
+
+    public function assertStringContains($needle, $haystack)
+    {
+        if (method_exists($this, 'assertStringContainsString')) {
+            $this->assertStringContainsString($needle, $haystack);
+        } else {
+            $this->assertContains($needle, $haystack);
+        }
+    }
 }
diff --git a/tests/ValidatorTest.php b/tests/ValidatorTest.php
index beca390..0646c70 100644
--- a/tests/ValidatorTest.php
+++ b/tests/ValidatorTest.php
@@ -8,59 +8,54 @@
 
 class ValidatorTest extends TestCase
 {
-    /**
-     * @test
-     * @expectedException InvalidArgumentException
-     */
+    /** @test */
     public function a_label_cannot_contain_more_than_255_characters()
     {
+        $this->expectException(InvalidArgumentException::class);
+
         Email::compose()
             ->label(str_repeat('a', 256))
             ->send();
     }
 
-    /**
-     * @test
-     * @expectedException InvalidArgumentException
-     * @expectedExceptionMessage No recipient specified
-     */
+    /** @test */
     public function a_recipient_is_required()
     {
+        $this->expectException(InvalidArgumentException::class);
+        $this->expectExceptionMessage('No recipient specified');
+
         Email::compose()
             ->send();
     }
 
-    /**
-     * @test
-     * @expectedException InvalidArgumentException
-     * @expectedExceptionMessage No recipient specified
-     */
+    /** @test */
     public function a_recipient_cannot_be_empty()
     {
+        $this->expectException(InvalidArgumentException::class);
+        $this->expectExceptionMessage('No recipient specified');
+
         Email::compose()
             ->recipient([])
             ->send();
     }
 
-    /**
-     * @test
-     * @expectedException InvalidArgumentException
-     * @expectedExceptionMessage E-mail address [not-a-valid-email-address] is invalid
-     */
+    /** @test */
     public function the_recipient_email_must_be_valid()
     {
+        $this->expectException(InvalidArgumentException::class);
+        $this->expectExceptionMessage('E-mail address [not-a-valid-email-address] is invalid');
+
         Email::compose()
             ->recipient('not-a-valid-email-address')
             ->send();
     }
 
-    /**
-     * @test
-     * @expectedException InvalidArgumentException
-     * @expectedExceptionMessage E-mail address [not-a-valid-email-address] is invalid
-     */
+    /** @test */
     public function cc_must_contain_valid_email_addresses()
     {
+        $this->expectException(InvalidArgumentException::class);
+        $this->expectExceptionMessage('E-mail address [not-a-valid-email-address] is invalid');
+
         Email::compose()
             ->recipient('john@doe.com')
             ->cc([
@@ -70,13 +65,12 @@ public function cc_must_contain_valid_email_addresses()
             ->send();
     }
 
-    /**
-     * @test
-     * @expectedException InvalidArgumentException
-     * @expectedExceptionMessage E-mail address [not-a-valid-email-address] is invalid
-     */
+    /** @test */
     public function bcc_must_contain_valid_email_addresses()
     {
+        $this->expectException(InvalidArgumentException::class);
+        $this->expectExceptionMessage('E-mail address [not-a-valid-email-address] is invalid');
+
         Email::compose()
             ->recipient('john@doe.com')
             ->bcc([
@@ -86,25 +80,23 @@ public function bcc_must_contain_valid_email_addresses()
             ->send();
     }
 
-    /**
-     * @test
-     * @expectedException InvalidArgumentException
-     * @expectedExceptionMessage No subject specified
-     */
+    /** @test */
     public function a_subject_is_required()
     {
+        $this->expectException(InvalidArgumentException::class);
+        $this->expectExceptionMessage('No subject specified');
+
         Email::compose()
             ->recipient('john@doe.com')
             ->send();
     }
 
-    /**
-     * @test
-     * @expectedException InvalidArgumentException
-     * @expectedExceptionMessage No view specified
-     */
+    /** @test */
     public function a_view_is_required()
     {
+        $this->expectException(InvalidArgumentException::class);
+        $this->expectExceptionMessage('No view specified');
+
         Email::compose()
             ->recipient('john@doe.com')
             ->subject('test')