diff --git a/README.md b/README.md
index b9cd186..054a659 100644
--- a/README.md
+++ b/README.md
@@ -54,7 +54,7 @@ Fast JSON API serialized 250 records in 3.01 ms
 Add this line to your application's Gemfile:
 
 ```ruby
-gem 'fast_jsonapi'
+gem 'fast_jsonapi', '~> 1.6.0', git: 'https://github.com/fast-jsonapi/fast_jsonapi'
 ```
 
 Execute: