diff --git a/composer.json b/composer.json
index 16faa80..4eeb8a0 100644
--- a/composer.json
+++ b/composer.json
@@ -49,7 +49,7 @@
         }
     },
     "require": {
-        "php": "^5.6 || ^7.0",
+        "php": "^7.4 || ^8.0",
         "ext-curl": "*",
         "ext-json": "*"
     },
@@ -59,7 +59,7 @@
         "phpdocumentor/phpdocumentor": "^2.9.0",
         "phploc/phploc": "^3.0.1",
         "phpmd/phpmd": "^2.4.3",
-        "phpunit/phpunit": "^5.5.4",
+        "phpunit/phpunit": "^8.0",
         "satooshi/php-coveralls": "^1.0.1",
         "sebastian/phpcpd": "^2.0.4",
         "squizlabs/php_codesniffer": "^3.5",
diff --git a/src/test/php/Gomoob/Pushwoosh/Model/Notification/AndroidTest.php b/src/test/php/Gomoob/Pushwoosh/Model/Notification/AndroidTest.php
index d97ec31..4078ff7 100644
--- a/src/test/php/Gomoob/Pushwoosh/Model/Notification/AndroidTest.php
+++ b/src/test/php/Gomoob/Pushwoosh/Model/Notification/AndroidTest.php
@@ -174,7 +174,7 @@ public function testJsonSerialize()
             ->setVibration(true)
             ->jsonSerialize();
 
-        $this->assertCount(12, $array);
+        $this->assertCount(13, $array);
         $this->assertSame('http://example.com/banner.png', $array['android_banner']);
         $this->assertSame(5, $array['android_badges']);
         $this->assertSame('http://example.com/image.png', $array['android_custom_icon']);
diff --git a/src/test/php/Gomoob/Pushwoosh/Model/Notification/HuaweiTest.php b/src/test/php/Gomoob/Pushwoosh/Model/Notification/HuaweiTest.php
index 217c616..3738724 100644
--- a/src/test/php/Gomoob/Pushwoosh/Model/Notification/HuaweiTest.php
+++ b/src/test/php/Gomoob/Pushwoosh/Model/Notification/HuaweiTest.php
@@ -120,7 +120,7 @@ public function testJsonSerialize()
             ->setVibration(true)
             ->jsonSerialize();
 
-        $this->assertCount(12, $array);
+        $this->assertCount(13, $array);
         $this->assertSame('http://example.com/banner.png', $array['huawei_android_banner']);
         $this->assertSame(5, $array['huawei_android_badges']);
         $this->assertSame('http://example.com/image.png', $array['huawei_android_custom_icon']);
diff --git a/src/test/php/Gomoob/Pushwoosh/Model/Notification/IOSTest.php b/src/test/php/Gomoob/Pushwoosh/Model/Notification/IOSTest.php
index 9390a2c..467413f 100644
--- a/src/test/php/Gomoob/Pushwoosh/Model/Notification/IOSTest.php
+++ b/src/test/php/Gomoob/Pushwoosh/Model/Notification/IOSTest.php
@@ -120,7 +120,7 @@ public function testJsonSerialize()
             ->setTrimContent(true)
             ->jsonSerialize();
 
-        $this->assertCount(7, $array);
+        $this->assertCount(8, $array);
         $this->assertSame(1, $array['apns_trim_content']);
         $this->assertSame(5, $array['ios_badges']);
         $this->assertSame('1', $array['ios_category_id']);
diff --git a/src/test/php/Gomoob/Pushwoosh/Model/Notification/NotificationTest.php b/src/test/php/Gomoob/Pushwoosh/Model/Notification/NotificationTest.php
index 1d4a03f..8feb71b 100644
--- a/src/test/php/Gomoob/Pushwoosh/Model/Notification/NotificationTest.php
+++ b/src/test/php/Gomoob/Pushwoosh/Model/Notification/NotificationTest.php
@@ -622,7 +622,7 @@ public function testJsonSerialize()
             ->jsonSerialize();
 
         // Test the generic properties
-        $this->assertCount(77, $array);
+        $this->assertCount(80, $array);
         $this->assertSame('now', $array['send_date']);
         $this->assertSame('America/New_York', $array['timezone']);
         $this->assertTrue($array['ignore_user_timezone']);