diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
new file mode 100644
index 0000000..1ba71e6
--- /dev/null
+++ b/.github/workflows/tests.yml
@@ -0,0 +1,35 @@
+name: Tests
+
+on: [push, pull_request]
+
+jobs:
+  tests:
+    name: Tests PHP ${{ matrix.php }}
+    runs-on: ubuntu-latest
+    continue-on-error: ${{ matrix.experimental }}
+    strategy:
+      fail-fast: false
+      matrix:
+        php: [7.3, 7.4, 8.0]
+        experimental: [false]
+        include:
+          - php: 7.4
+            analysis: true
+          - php: 8.1
+            experimental: true
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Set up PHP ${{ matrix.php }}
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          coverage: xdebug
+
+      - name: Install dependencies with Composer
+        uses: ramsey/composer-install@v1
+
+      - name: Tests
+        run: composer test
\ No newline at end of file
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100755
index 58f7322..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,10 +0,0 @@
-language: php
-
-php:
-  - 5.3
-  - 5.4
-  - 5.5
-  - 5.6
-  - 7.0
-
-script: phpunit
diff --git a/README.md b/README.md
index c1801f2..ae0eb8f 100755
--- a/README.md
+++ b/README.md
@@ -7,7 +7,13 @@ Splits stylesheets that go beyond the IE limit of 4096 selectors. See this [MSDN
 
 ## Installation
 
-Use composer
+It's recommended to use [Composer](https://getcomposer.org) to install
+
+```bash
+$ composer require dlundgren/php-css-splitter
+```
+
+This will install the CssSplitter library and any required dependencies.
 
 ## Usage
 
@@ -32,11 +38,10 @@ if($additional_part_count > 0) {
 		file_put_contents('styles_'. $part .'.css', $splitter->split($css, $part));
 	}
 }
-
-
 ```
+
 ## Credits & License
 
 Original inspiration came from the Ruby gem [CssSplitter](https://github.com/zweilove/css_splitter).
 
-Uses the MIT license.
+CssSplitter is licensed under the MIT license. See [License File](LICENSE) for more information.
\ No newline at end of file
diff --git a/composer.json b/composer.json
old mode 100755
new mode 100644
index 706dd62..3092ac0
--- a/composer.json
+++ b/composer.json
@@ -19,9 +19,12 @@
 		}
 	},
 	"require"     : {
-		"php"             : ">=5.3.0"
+		"php"             : ">=7.3"
 	},
 	"require-dev" : {
-		"phpunit/phpunit" : "3.7.*"
+		"phpunit/phpunit" : "^9.0"
+	},
+	"scripts": {
+		"test": "phpunit"
 	}
 }
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 0ca6553..d91e770 100755
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -1,23 +1,22 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit backupGlobals="false"
          backupStaticAttributes="false"
+         bootstrap="tests/bootstrap.php"
          colors="true"
          convertErrorsToExceptions="true"
          convertNoticesToExceptions="true"
          convertWarningsToExceptions="true"
          processIsolation="false"
-         stopOnFailure="false"
-         syntaxCheck="false"
-         bootstrap="tests/bootstrap.php"
+         stopOnFailure="true"
 >
+	<coverage processUncoveredFiles="true">
+		<include>
+			<directory suffix=".php">./src</directory>
+		</include>
+	</coverage>
 	<testsuites>
 		<testsuite name="CSS Splitter Tests">
 			<directory>./tests/Tests</directory>
 		</testsuite>
 	</testsuites>
-	<filter>
-		<whitelist>
-			<directory>./src/</directory>
-		</whitelist>
-	</filter>
 </phpunit>
diff --git a/tests/Tests/SplitterTest.php b/tests/Tests/SplitterTest.php
index 25ec8f3..f46981a 100755
--- a/tests/Tests/SplitterTest.php
+++ b/tests/Tests/SplitterTest.php
@@ -11,9 +11,10 @@
 namespace CssSplitter\Tests;
 
 use CssSplitter\Splitter;
+use PHPUnit\Framework\TestCase;
 
 class SplitterTest
-	extends \PHPUnit_Framework_TestCase
+	extends TestCase
 {
 	public static function provideSplitFilesAndExpectedResults()
 	{