diff --git a/lib/mail_catcher.rb b/lib/mail_catcher.rb
index 328d231..9d4d410 100644
--- a/lib/mail_catcher.rb
+++ b/lib/mail_catcher.rb
@@ -1,6 +1,5 @@
 # Apparently rubygems won't activate these on its own, so here we go. Let's
 # repeat the invention of Bundler all over again.
-gem "activesupport", "~> 4.0"
 gem "eventmachine", "1.0.9.1"
 gem "mail", "~> 2.3"
 gem "rack", "~> 1.5"
@@ -13,7 +12,6 @@ require "open3"
 require "optparse"
 require "rbconfig"
 
-require "active_support/all"
 require "eventmachine"
 require "thin"
 
diff --git a/mailcatcher.gemspec b/mailcatcher.gemspec
index e29d19c..5861676 100644
--- a/mailcatcher.gemspec
+++ b/mailcatcher.gemspec
@@ -30,7 +30,6 @@ Gem::Specification.new do |s|
 
   s.required_ruby_version = ">= 1.9.3"
 
-  s.add_dependency "activesupport", "~> 4.0"
   s.add_dependency "eventmachine", "1.0.9.1"
   s.add_dependency "mail", "~> 2.3"
   s.add_dependency "rack", "~> 1.5"