diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 70c62ee..799cd49 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -9,7 +9,7 @@ jobs:
 
     strategy:
       matrix:
-        php-version: [ 5.6, "7.0", 7.1, 7.2, 7.3, 7.4 ]
+        php-version: [ 7.2, 7.3, 7.4, "8.0", 8.1, 8.2 ]
         os: [ ubuntu-latest ]
 
     steps:
diff --git a/.gitignore b/.gitignore
index 33306ea..acecdef 100755
--- a/.gitignore
+++ b/.gitignore
@@ -13,4 +13,8 @@
 *.xml
 
 # ignore PHPStorm files
-.idea/*
\ No newline at end of file
+.idea/*
+
+# PHPUnit
+/phpunit.xml
+.phpunit.result.cache
diff --git a/README.md b/README.md
index 4f16c17..2f5db50 100755
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ easy inclusion in your projects.
 ## Requirements
 
 - a server with:
-  - PHP 5.6 or higher 
+  - PHP 7.2 or higher 
   - PHP json and PHP cURL modules
   - tested on Apache 2.4 with PHP 5.6.1 and cURL 7.42.1 and with PHP 7.4.9 and cURL 7.68.0
 - direct network connectivity between this server and the host and port (usually TCP port 8443 or port 443 for 
diff --git a/composer.json b/composer.json
index dc61f2c..cd9e516 100755
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,7 @@
         }
     ],
     "require": {
-        "php": ">=5.6",
+        "php": ">=7.2",
         "ext-curl": "*",
         "ext-json": "*"
     },
@@ -30,7 +30,7 @@
         }
     },
     "require-dev": {
-        "phpunit/phpunit": "^5.7"
+        "phpunit/phpunit": "^8.5"
     },
     "scripts": {
         "test" : [
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index b65be17..6894478 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/5.7/phpunit.xsd"
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/8.5/phpunit.xsd"
          colors="true">
     <testsuites>
         <testsuite name="Unit tests">
diff --git a/tests/ClientTest.php b/tests/ClientTest.php
index c90a1b0..3ba4040 100644
--- a/tests/ClientTest.php
+++ b/tests/ClientTest.php
@@ -9,7 +9,7 @@ class ClientTest extends TestCase
 {
     private $client;
 
-    protected function setUp()
+    protected function setUp(): void
     {
         $this->client = new Client('unifi', 'unifi');
     }
@@ -29,9 +29,8 @@ public function testSetSite()
 
         // whitespace (debug mode)
         $this->client->set_debug(true);
-        $this->expectException(\PHPUnit_Framework_Error_Notice::class);
-        $this->expectExceptionCode(E_USER_NOTICE);
-        $this->expectExceptionMessage('The provided (short) site name may not contain any spaces');
+        $this->expectNotice();
+        $this->expectNoticeMessage('The provided (short) site name may not contain any spaces');
         $this->client->set_site('   foobar ');
     }
 }