Rakefile in mize-0.3.5 vs Rakefile in mize-0.4.0

@@ -15,10 +15,10 @@
   test_dir    'spec'
   ignore      '.*.sw[pon]', 'pkg', 'Gemfile.lock', 'coverage', '.rvmrc',
     '.AppleDouble', 'tags', '.byebug_history', '.yard*', 'errors.lst'
 
 
-  dependency 'protocol'
+  dependency 'protocol', '~> 2.0'
   development_dependency 'rake'
   development_dependency 'simplecov'
   development_dependency 'rspec'
   development_dependency 'yard'