diff --git a/Gemfile b/Gemfile
index 18bafa2..6f87cf9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,8 +3,6 @@ source "https://rubygems.org"
 gemspec
 
 gem 'rake'
-gem 'activesupport'
 
 group :development do
-  gem "hexdump"
 end
diff --git a/lib/X11.rb b/lib/X11.rb
index b4a5c3a..410b13a 100644
--- a/lib/X11.rb
+++ b/lib/X11.rb
@@ -3,8 +3,6 @@ module X11
 end
 
 require 'socket'
-require 'active_support'
-require 'hexdump'
 require 'X11/protocol'
 require 'X11/auth'
 require 'X11/display'