diff --git a/README.md b/README.md
index 93d1d19..2a05db7 100755
--- a/README.md
+++ b/README.md
@@ -109,22 +109,22 @@ The library can attempt to check your local environment and API credentials, use
 ```php
 // Common configuration parameters
 
-  // Marketplace ID will be 0 for Tour Operators, non-zero for Marketplace Agents
-  // Agents can find their Marketplace ID in the API page in TourCMS settings
-    $marketplace_id = 0;
+// Marketplace ID will be 0 for Tour Operators, non-zero for Marketplace Agents
+// Agents can find their Marketplace ID in the API page in TourCMS settings
+$marketplace_id = 0;
 
-  // API key will be a string, find it in the API page in TourCMS settings
-    $api_key = "YOUR_KEY_HERE";
+// API key will be a string, find it in the API page in TourCMS settings
+$api_key = "YOUR_KEY_HERE";
 
-  // Channel ID represents the Tour Operator channel to call the API against
-  // Tour Operators may have multiple channels, so enter the correct one here
-  // Agents can leave this as 0 for the test
-    $channel_id = 0;
+// Channel ID represents the Tour Operator channel to call the API against
+// Tour Operators may have multiple channels, so enter the correct one here
+// Agents can leave this as 0 for the test
+$channel_id = 0;
 
 // Create a new TourCMS instance
-  // Optionally alias the namespace
-  use TourCMS\Utils\TourCMS as TourCMS;
-  $tourcms = new TourCMS($marketplace_id, $api_key, "simplexml");
+// Optionally alias the namespace
+use TourCMS\Utils\TourCMS as TourCMS;
+$tourcms = new TourCMS($marketplace_id, $api_key, "simplexml");
 
 // Call the environment test, the results will be displayed on the screen
 $tourcms->test_environment($channel_id);
diff --git a/composer.json b/composer.json
index 6fb026a..f239bde 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
         }
     ],
     "require": {
-        "php": ">=5.3"
+        "php": ">=8.1"
     },
     "autoload": {
         "psr-4": {"TourCMS\\Utils\\": "src/"}
diff --git a/src/TourCMS.php b/src/TourCMS.php
index ebb6998..c4a1c50 100755
--- a/src/TourCMS.php
+++ b/src/TourCMS.php
@@ -1,6 +1,6 @@
 <?php
 /*
-Copyright (c) 2010-2019 Travel UCD
+Copyright (c) 2010 - 2024 Travel UCD
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -22,7 +22,7 @@
 */
 
 # TourCMS: PHP wrapper class for TourCMS Rest API
-# Version: 4.7.0
+# Version: 4.8.0
 
 namespace TourCMS\Utils;