diff --git a/lib/jekyll/configuration.rb b/lib/jekyll/configuration.rb
index 27e245e4..b4bf7c5a 100644
--- a/lib/jekyll/configuration.rb
+++ b/lib/jekyll/configuration.rb
@@ -18,7 +18,8 @@ module Jekyll
       "safe"              => false,
       "include"           => [".htaccess"],
       "exclude"           => %w(
-        node_modules vendor/bundle/ vendor/cache/ vendor/gems/ vendor/ruby/
+        Gemfile Gemfile.lock node_modules vendor/bundle/ vendor/cache/ vendor/gems/
+        vendor/ruby/
       ),
       "keep_files"        => [".git", ".svn"],
       "encoding"          => "utf-8",