diff --git a/composer.json b/composer.json
index b44d7a1..4cba31c 100644
--- a/composer.json
+++ b/composer.json
@@ -2,7 +2,7 @@
   "name": "mightypork/phpmodbus",
   "keywords": ["phpmodbus","modbus"],
   "description": "PhpModbus with namespaces and updated to PHP 7",
-  "license": "LGPL",
+  "license": "LGPL-2.1-or-later",
   "require": {
     "php": "^5.3.2 || ^7.0",
     "ext-sockets": "*"