diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2a6e37d..5f6296b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,7 @@
     (Adam Prescott) [Issue #493]
 *   Ensure process exits with correct status code and $! is propagated.
     (Micah Geisel) [Issue #497]
+*   Close dup'ed fd after using (Dmitry Vorotilin) [Issue #446, #529, #528]
 
 ### 1.5.0 ###
 
diff --git a/lib/capybara/poltergeist/client.rb b/lib/capybara/poltergeist/client.rb
index 5fa6688..38357b2 100644
--- a/lib/capybara/poltergeist/client.rb
+++ b/lib/capybara/poltergeist/client.rb
@@ -99,13 +99,13 @@ module Capybara::Poltergeist
     # it works with JRuby but I've experienced strange mistakes on Rubinius.
     def redirect_stdout
       prev = STDOUT.dup
-      prev.autoclose = false
       $stdout = @write_io
       STDOUT.reopen(@write_io)
       yield
     ensure
       STDOUT.reopen(prev)
       $stdout = STDOUT
+      prev.close
     end
 
     def kill_phantomjs