diff --git a/lib/capybara/server.rb b/lib/capybara/server.rb
index a5b155d0..676822b9 100644
--- a/lib/capybara/server.rb
+++ b/lib/capybara/server.rb
@@ -32,7 +32,7 @@ module Capybara
     end
 
     def host
-      "localhost"
+      "127.0.0.1"
     end
 
     def url(path)