Update copyright to 2015
diff --git a/src/ruby/bin/math_server.rb b/src/ruby/bin/math_server.rb
index 55ee1d3..ff38b2a 100755
--- a/src/ruby/bin/math_server.rb
+++ b/src/ruby/bin/math_server.rb
@@ -1,6 +1,6 @@
 #!/usr/bin/env ruby
 
-# Copyright 2014, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -187,4 +187,4 @@
   s.run
 end
 
-main
+main
\ No newline at end of file