diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3cfdc3e..fcb693e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,13 @@
 
 This is the Developer Changelog for Matomo PHP Tracker. All breaking changes or new features are listed below.
 
+## Matomo PHP Tracker 3.3.0
+### Removed
+- support for PHP versions lower than 7.2
+### Changed
+- all `MatomoTracker` class constants are now explicitly public
+- all `MatomoTracker` dynamic properties are now explicitly public
+
 ## Matomo PHP Tracker 3.0.0
 
 Attention: This version of Matomo PHP Tracker is no longer compatible with Matomo 3.x or earlier
diff --git a/MatomoTracker.php b/MatomoTracker.php
index 6ca4c08..7b65ace 100644
--- a/MatomoTracker.php
+++ b/MatomoTracker.php
@@ -37,7 +37,7 @@ class MatomoTracker
      * @ignore
      * @var int
      */
-    const VERSION = 1;
+    public const VERSION = 1;
 
     /**
      * @ignore
@@ -49,27 +49,27 @@ class MatomoTracker
      *
      * @ignore
      */
-    const LENGTH_VISITOR_ID = 16;
+    public const LENGTH_VISITOR_ID = 16;
 
     /**
      * Charset
      * @see setPageCharset
      * @ignore
      */
-    const DEFAULT_CHARSET_PARAMETER_VALUES = 'utf-8';
+    public const DEFAULT_CHARSET_PARAMETER_VALUES = 'utf-8';
 
     /**
      * See matomo.js
      */
-    const FIRST_PARTY_COOKIES_PREFIX = '_pk_';
+    public const FIRST_PARTY_COOKIES_PREFIX = '_pk_';
 
     /**
      * Defines how many categories can be used max when calling addEcommerceItem().
      * @var int
      */
-    const MAX_NUM_ECOMMERCE_ITEM_CATEGORIES = 5;
+    public const MAX_NUM_ECOMMERCE_ITEM_CATEGORIES = 5;
 
-    const DEFAULT_COOKIE_PATH = '/';
+    public const DEFAULT_COOKIE_PATH = '/';
 
     public $ecommerceItems = [];
 
diff --git a/composer.json b/composer.json
index c4c6f98..298087d 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,7 @@
         "source": "https://github.com/matomo-org/matomo-php-tracker"
     },
     "require": {
-        "php": "^7.0 || ^8.0",
+        "php": "^7.2 || ^8.0",
         "ext-json": "*"
     },
     "suggest": {
@@ -26,13 +26,11 @@
     "autoload": {
         "classmap": ["."]
     },
-
     "autoload-dev": {
         "psr-4": {
             "\\": "tests/"
         }
     },
-
     "require-dev": {
         "phpunit/phpunit": "^9.3 || ^10.1"
     }
diff --git a/tests/Unit/MatomoTrackerTest.php b/tests/Unit/MatomoTrackerTest.php
index 1dcf5c1..703b631 100644
--- a/tests/Unit/MatomoTrackerTest.php
+++ b/tests/Unit/MatomoTrackerTest.php
@@ -1,4 +1,7 @@
 <?php
+
+declare(strict_types=1);
+
 /**
  * Matomo - free/libre analytics platform
  *