diff --git a/lib/fizzbuzz.rb b/lib/fizzbuzz.rb
index 4746a88..e04cfd4 100644
--- a/lib/fizzbuzz.rb
+++ b/lib/fizzbuzz.rb
@@ -1,11 +1,15 @@
 class Fizzbuzz
   def calculate number
-    if number % 3 == 0 && number % 5 == 0
+    if number.to_s.include? '7'
+      'GitHub'
+    elsif number % 3 == 0 && number % 5 == 0
       'fizzbuzz'
     elsif number % 3 == 0
       'fizz'
     elsif number % 5 == 0
       'buzz'
+    elsif number .to_s.include? '7'
+      'GitHub'
     else
       number
     end