diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..e69de29
diff --git a/README.md b/README.md
index 2b9b60f..b770055 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ activity, making it accessible only to users from specified IP addresses.
 * Author: Luuk Verhoeven, [ldesignmedia.nl](https://ldesignmedia.nl/)
 * Author: Vincent Cornelis, [ldesignmedia.nl](https://ldesignmedia.nl/)
 * Min. required: Moodle 4.0
-* Supports PHP: 7.4
+* Supports PHP: 7.3+
 
 ![Moodle400](https://img.shields.io/badge/moodle-4.0-F98012.svg?logo=moodle)
 ![Moodle401](https://img.shields.io/badge/moodle-4.1-F98012.svg?logo=moodle)
@@ -22,6 +22,7 @@ activity, making it accessible only to users from specified IP addresses.
 ![Moodle500](https://img.shields.io/badge/moodle-5.0-F98012.svg?logo=moodle)
 ![Moodle501](https://img.shields.io/badge/moodle-5.1-F98012.svg?logo=moodle)
 
+![PHP7.3](https://img.shields.io/badge/PHP-7.3-777BB4.svg?logo=php)
 ![PHP7.4](https://img.shields.io/badge/PHP-7.4-777BB4.svg?logo=php)
 ![PHP8.0](https://img.shields.io/badge/PHP-8.0-777BB4.svg?logo=php)
 ![PHP8.1](https://img.shields.io/badge/PHP-8.1-777BB4.svg?logo=php)
@@ -63,6 +64,6 @@ The GNU GENERAL PUBLIC LICENSE. Please see [License File](LICENSE) for more info
 
 Contributions are welcome and will be fully credited. We accept contributions via Pull Requests on Github.
 
-## Changelog
+### Changelog
 
 See [CHANGELOG.md](CHANGELOG.md) for a full list of changes.
diff --git a/classes/condition.php b/classes/condition.php
index 0c0d6f2..ce59a02 100644
--- a/classes/condition.php
+++ b/classes/condition.php
@@ -41,14 +41,14 @@ class condition extends \core_availability\condition {
      *
      * @var string
      */
-    protected string $ipaddresses = '';
+    protected $ipaddresses = '';
 
     /**
      * Predefined IP address ranges.
      *
      * @var array
      */
-    protected array $predefinedranges = [];
+    protected $predefinedranges = [];
 
     /**
      * condition constructor.
diff --git a/environment.xml b/environment.xml
index cff201b..dd3ab8f 100644
--- a/environment.xml
+++ b/environment.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <COMPATIBILITY_MATRIX>
     <PLUGIN name="availability_ipaddress">
-        <PHP version="7.4" level="required"/>
+        <PHP version="7.3" level="required"/>
     </PLUGIN>
 </COMPATIBILITY_MATRIX>
diff --git a/version.php b/version.php
index 75516ed..ee48b21 100644
--- a/version.php
+++ b/version.php
@@ -27,7 +27,7 @@
 defined('MOODLE_INTERNAL') || die();
 
 $plugin->component = 'availability_ipaddress';
-$plugin->version = 2026030300;
+$plugin->version = 2026031800;
 $plugin->release = '5.1.0';
 $plugin->requires = 2016120500;
 $plugin->maturity = MATURITY_STABLE;