Rakefile in signet-0.5.0 vs Rakefile in signet-0.5.1

@@ -24,10 +24,10 @@
 
 PKG_FILES = FileList[
     "lib/**/*", "spec/**/*", "vendor/**/*",
     "tasks/**/*", "website/**/*",
     "[A-Z]*", "Rakefile"
-].exclude(/database\.yml/).exclude(/[_\.]git$/)
+].exclude(/database\.yml/).exclude(/[_\.]git$/).exclude(/Gemfile\.lock/)
 
 RCOV_ENABLED = !!(RUBY_PLATFORM != 'java' && RUBY_VERSION =~ /^1\.8/)
 if RCOV_ENABLED
   task :default => 'spec:rcov'
 else