diff --git a/.gitignore b/.gitignore
index f567539..716b1f6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 /composer.lock
 /vendor
 .idea/
+.phpunit.result.cache
diff --git a/composer.json b/composer.json
index 4e75736..9187ebd 100644
--- a/composer.json
+++ b/composer.json
@@ -18,10 +18,10 @@
     }
   ],
   "require": {
-    "php": "^5.6|^7.0"
+    "php": ">=5.6"
   },
   "require-dev": {
-    "phpunit/phpunit": "^5.7"
+    "phpunit/phpunit": "^9.0"
   },
   "autoload": {
     "psr-4": {
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 7c557c8..f34ef35 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -1,10 +1,13 @@
-<phpunit bootstrap="tests/bootstrap.php">
-    <testsuite>
-        <directory suffix="Test.php">tests</directory>
-    </testsuite>
-    <filter>
-        <whitelist processUncoveredFilesFromWhitelist="true">
-            <directory suffix=".php">src</directory>
-        </whitelist>
-    </filter>
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" bootstrap="vendor/autoload.php" backupGlobals="false" backupStaticAttributes="false" colors="true" verbose="true" convertErrorsToExceptions="true" convertNoticesToExceptions="true" convertWarningsToExceptions="true" processIsolation="false" stopOnFailure="false" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
+    <coverage>
+        <include>
+            <directory suffix=".php">tests/</directory>
+        </include>
+    </coverage>
+    <testsuites>
+        <testsuite name="Tests">
+            <directory>tests</directory>
+        </testsuite>
+    </testsuites>
 </phpunit>
diff --git a/tests/QrReaderTest.php b/tests/QrReaderTest.php
index 10d2ff3..b4c1367 100644
--- a/tests/QrReaderTest.php
+++ b/tests/QrReaderTest.php
@@ -2,9 +2,10 @@
 
 namespace Khanamiryan\QrCodeTests;
 
+use PHPUnit\Framework\TestCase;
 use Zxing\QrReader;
 
-class QrReaderTest extends \PHPUnit\Framework\TestCase
+class QrReaderTest extends TestCase
 {
 
     public function testText1()
diff --git a/tests/QrReaderTest.php~ b/tests/QrReaderTest.php~
deleted file mode 100644
index c5ac9c2..0000000
--- a/tests/QrReaderTest.php~
+++ /dev/null
@@ -1,17 +0,0 @@
-<?php
-
-namespace Khanamiryan\QrCodeTests;
-
-use Zxing\QrReader;
-
-class QrReaderTest extends \PHPUnit_Framework_TestCase
-{
-
-    public function testText1()
-    {
-        $image = __DIR__ . "/qrcodes/hello_world.png";
-
-        $qrcode = new QrReader($image);
-        $this->assertSame("Hello world!", $qrcode->text());
-    }
-}