diff --git a/composer.json b/composer.json
index ecec0a4..554a02b 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,8 @@
         "netcommons/users":             "dev-master",
         "netcommons/workflow":          "dev-master"
     },
-    "license": "NetCommons License",
+    "license": "LicenseRef-NetCommons",
+    "license-ref-net-commons": "https://raw.githubusercontent.com/NetCommons3/NetCommons3/master/license.txt",
     "authors": [
         {
           "name": "Hirohisa Kuwata(WithOne)",