diff --git a/README.md b/README.md
index fa3dc3e..93138e7 100644
--- a/README.md
+++ b/README.md
@@ -53,4 +53,4 @@ This package requires PHP 7.1 or later. We recommend using the latest PHP versio
 
 ## Copyright and license
 
-The MIT License (MIT) [http://www.opensource.org/licenses/mit-license.php](http://www.opensource.org/licenses/mit-license.php)
+The MIT License (MIT) [https://www.opensource.org/licenses/mit-license.php](http://www.opensource.org/licenses/mit-license.php)