diff --git a/package.json b/package.json
index edbdc68..dc0b9d6 100644
--- a/package.json
+++ b/package.json
@@ -1,8 +1,9 @@
 {
     "name": "npid",
     "description": "Manage a pid file.",
-    "version": "0.4.0",
+    "version": "0.4.1",
     "author": "Mathieu Turcotte <turcotte.mat@gmail.com>",
+    "license": "MIT",
     "keywords": ["util", "pid", "daemon", "process"],
     "repository": {
         "type": "git",