diff --git a/composer.json b/composer.json
index e189cd8..fff1060 100644
--- a/composer.json
+++ b/composer.json
@@ -2,7 +2,8 @@
     "name":        "netcommons/registrations",
     "description": "Registrations for NetCommons Plugin",
     "homepage":    "http://www.netcommons.org/",
-    "license":     "NetCommons License",
+    "license": "LicenseRef-NetCommons",
+    "license-ref-net-commons": "https://raw.githubusercontent.com/NetCommons3/NetCommons3/master/license.txt",
     "authors": [
         {
             "name": "Ryuji AMANO (RYUS INC.)",