diff --git a/lib/offsite_payments.rb b/lib/offsite_payments.rb
index 7151c9ef..7255b520 100644
--- a/lib/offsite_payments.rb
+++ b/lib/offsite_payments.rb
@@ -32,6 +32,11 @@ def self.integration(name)
     Integrations.const_get("#{name.to_s.downcase}".camelize)
   end
 
+  def self.eager_load!
+    Integrations.eager_load!
+    nil
+  end
+
   mattr_accessor :mode
   self.mode = :production
 
@@ -42,3 +47,5 @@ def self.test?
 
   CURRENCIES_WITHOUT_FRACTIONS = [ 'BIF', 'BYR', 'CLP', 'CVE', 'DJF', 'GNF', 'ISK', 'JPY', 'KMF', 'KRW', 'PYG', 'RWF', 'TWD', 'UGX', 'VND', 'VUV', 'XAF', 'XOF', 'XPF' ]
 end
+
+require "offsite_payments/railtie" if defined? Rails::Railtie
diff --git a/lib/offsite_payments/integrations.rb b/lib/offsite_payments/integrations.rb
index 6b483ce5..7b3e78b0 100644
--- a/lib/offsite_payments/integrations.rb
+++ b/lib/offsite_payments/integrations.rb
@@ -10,5 +10,12 @@ module Integrations
       # Register for autoloading
       autoload integration_class, f
     end
+
+    def self.eager_load!
+      constants.each do |const_name|
+        const_get(const_name)
+      end
+      nil
+    end
   end
 end
diff --git a/lib/offsite_payments/railtie.rb b/lib/offsite_payments/railtie.rb
new file mode 100644
index 00000000..9daed768
--- /dev/null
+++ b/lib/offsite_payments/railtie.rb
@@ -0,0 +1,7 @@
+module OffsitePayments
+  class Railtie < Rails::Railtie
+    config.before_eager_load do
+      config.eager_load_namespace << OffsitePayments
+    end
+  end
+end
diff --git a/test/test_helper.rb b/test/test_helper.rb
index c025e8b7..07abce6d 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -9,6 +9,7 @@
 require 'json'
 require 'nokogiri'
 
+require 'active_support'
 require 'active_support/core_ext/integer/time'
 require 'active_support/core_ext/numeric/time'
 require 'active_support/core_ext/time/acts_like'