diff --git a/package.json b/package.json
index 37c6ed9..7ae06ae 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
     "curve"
   ],
   "author": "Kagami Hiiragi",
-  "license": "CC0",
+  "license": "CC0-1.0",
   "bugs": {
     "url": "https://github.com/bitchan/eccrypto/issues"
   },