diff --git a/composer.json b/composer.json
index b959b0a..31208a1 100644
--- a/composer.json
+++ b/composer.json
@@ -2,6 +2,7 @@
   "name": "piwikpro/CustomTrackerJs",
   "type": "piwik-plugin",
   "description": "Piwik plugin to let super users and plugins customize the piwik.js tracker file.",
+  "license": "GPL-3.0+",
   "homepage": "http://piwik.pro",
   "authors": [
     {