README.md in tanuki-universe-0.0.3 vs README.md in tanuki-universe-0.0.4

@@ -2,10 +2,20 @@
 
 Generate universe file from private Gitlab.
 
 Please see the following URL(https://docs.chef.io/api_chef_server.html#universe).
 
+## Caution(2017/11/09)⚠️
+
+Please add this to Gemfile.
+```
+gem 'gitlab', git: 'https://github.com/NARKOZ/gitlab.git'
+```
+It needs to be obtained from master branch to require fixes not included in the latest release.
+
+
+
 ## Installation
 
 Add this line to your application's Gemfile:
 
 ```ruby
@@ -41,13 +51,24 @@
 
 "group" can be omitted. In that case, It will search for Cookbook from all repositories.
 
 You can also use environment variables.
 - ENV['GITLAB_API_ENDPOINT']
-- ENV['GITLAB_API_PRIVATETOKEN']
+- ENV['GITLAB_API_PRIVATE_TOKEN']
 - ENV['GITLAB_COOKBOOKS_GROUP']
 
-In this case 'config.json' is unnecessary.
+Even then you need config file below.
+```
+{
+  "endpoints": [
+    {
+      "type": "gitlab",
+      "options": {}
+    }
+  ]
+}
+```
+
 
 ```
 Commands:
   tanuki-universe generate        # Generate universe file.
   tanuki-universe help [COMMAND]  # Describe available commands or one specific command