diff --git a/README.md b/README.md
index 117858a..9b883c6 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
 fizzbuzz [![Build Status](https://travis-ci.org/ituring/fizzbuzz.png)](https://travis-ci.org/ituring/fizzbuzz)
 
 本仓库供本书读者参考用，不接收任何形式的Pull Request，敬请谅解。
+
+Pull request 请到 https://github.com/ituring/first-pr 。
diff --git a/lib/fizzbuzz.rb b/lib/fizzbuzz.rb
index 717b0e7..ac0a8f0 100644
--- a/lib/fizzbuzz.rb
+++ b/lib/fizzbuzz.rb
@@ -8,6 +8,8 @@ def calculate number
       'fizz'
     elsif number % 5 == 0
       'buzz'
+	elsif number % 7==0
+	  'Github'
     else
       number
     end