diff --git a/composer.json b/composer.json
index 51cf92b..4e0ac9a 100644
--- a/composer.json
+++ b/composer.json
@@ -2,7 +2,7 @@
     "name": "rq/apr-calculator",
     "description": "EU annual percentage rate of charge (APR or APRC) calculator",
     "type": "library",
-    "license": "GPL-2.0-or-later",
+    "license": "MIT",
     "authors": [
         {
             "name": "Stephen Haunts",
diff --git a/src/Calculator.php b/src/Calculator.php
index e85eccb..38b46de 100644
--- a/src/Calculator.php
+++ b/src/Calculator.php
@@ -5,23 +5,12 @@
 use DomainException;
 
 /**
- * This file is part of APR Calculator.
- *
- * APR Calculator is free software: you can redistribute it and/or modify it under the terms of the
- * GNU General Public License as published by the Free Software Foundation, either version 2 of the
- * License, or (at your option) any later version.
- *
- * APR Calculator is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
- * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- * See the GNU General Public License for more details <http://www.gnu.org/licenses/>.
- *
  * @copyright © 2014 Stephen Haunts
  * @copyright © 2019 Rimas Kudelis
  * @author Stephen Haunts http://www.stephenhaunts.com
  * @author Graham Johnson
  * @author Rimas Kudelis https://rimas.kudelis.lt
- * @license http://www.gnu.org/licenses/ GNU General Public License, version 2 or later
+ * @license MIT
  * @link https://github.com/rimas-kudelis/php-apr-calculator
  */
 class Calculator
diff --git a/src/Instalment.php b/src/Instalment.php
index 9b50712..66e428c 100644
--- a/src/Instalment.php
+++ b/src/Instalment.php
@@ -3,23 +3,12 @@
 namespace RQ\APRCalculator;
 
 /**
- * This file is part of APR Calculator.
- *
- * APR Calculator is free software: you can redistribute it and/or modify it under the terms of the
- * GNU General Public License as published by the Free Software Foundation, either version 2 of the
- * License, or (at your option) any later version.
- *
- * APR Calculator is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
- * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- * See the GNU General Public License for more details <http://www.gnu.org/licenses/>.
- *
  * @copyright © 2014 Stephen Haunts
  * @copyright © 2019 Rimas Kudelis
  * @author Stephen Haunts http://www.stephenhaunts.com
  * @author Graham Johnson
  * @author Rimas Kudelis https://rimas.kudelis.lt
- * @license http://www.gnu.org/licenses/ GNU General Public License, version 2 or later
+ * @license MIT
  * @link https://github.com/rimas-kudelis/php-apr-calculator
  */
 class Instalment