Rakefile in ruby_ext-0.5.10 vs Rakefile in ruby_ext-4.0.0

@@ -5,8 +5,9 @@
 
 project \
   name: "ruby_ext",
   gem: true,
   summary: "Ruby Extensions",
+  version: '4.0.0',
 
   author: "Alexey Petrushin",
   homepage: "http://github.com/alexeypetrushin/ruby_ext"
\ No newline at end of file