diff --git a/README.md b/README.md
index e74eef0..8d40d2b 100644
--- a/README.md
+++ b/README.md
@@ -28,6 +28,10 @@ Use the `-p` option to specify an external private key. If this is not used, `ke
 
 Generate a 1,024-bit RSA private key within the directory. This is called automatically if a key is not specified, and `key.pem` does not exist.
 
+### crx -h
+
+Show information about using this utility, generated by [commander](https://github.com/visionmedia/commander.js).
+
 ## Examples
 
 Given the following directory structure:
diff --git a/package.json b/package.json
index 77cc646..407ad58 100644
--- a/package.json
+++ b/package.json
@@ -14,6 +14,8 @@
   "engines": {
     "node": "~0.4.12"
   },
-  "dependencies": {},
+  "dependencies": {
+    "commander": ""
+  },
   "devDependencies": {}
 }