diff --git a/lib/delayed/backend/shared_spec.rb b/lib/delayed/backend/shared_spec.rb
index a0c4c1390..a4dfb6896 100644
--- a/lib/delayed/backend/shared_spec.rb
+++ b/lib/delayed/backend/shared_spec.rb
@@ -1,6 +1,6 @@
 require File.expand_path('../../../../spec/sample_jobs', __FILE__)
 
-require 'active_support/core_ext'
+require 'active_support/core_ext/numeric/time'
 
 shared_examples_for 'a delayed_job backend' do
   let(:worker) { Delayed::Worker.new }
diff --git a/lib/delayed/performable_method.rb b/lib/delayed/performable_method.rb
index e9e3bdae1..0bd1fea49 100644
--- a/lib/delayed/performable_method.rb
+++ b/lib/delayed/performable_method.rb
@@ -1,11 +1,7 @@
-require 'active_support/core_ext/module/delegation'
-
 module Delayed
   class PerformableMethod
     attr_accessor :object, :method_name, :args
 
-    delegate :method, :to => :object
-
     def initialize(object, method_name, args)
       raise NoMethodError, "undefined method `#{method_name}' for #{object.inspect}" unless object.respond_to?(method_name, true)
 
@@ -30,6 +26,10 @@ def perform
       object.send(method_name, *args) if object
     end
 
+    def method(sym)
+      object.method(sym)
+    end
+
     def method_missing(symbol, *args)
       object.send(symbol, *args)
     end
diff --git a/lib/delayed/worker.rb b/lib/delayed/worker.rb
index ff6c5431c..17d87576a 100644
--- a/lib/delayed/worker.rb
+++ b/lib/delayed/worker.rb
@@ -1,8 +1,7 @@
 require 'timeout'
+require 'active_support/dependencies'
 require 'active_support/core_ext/numeric/time'
 require 'active_support/core_ext/class/attribute_accessors'
-require 'active_support/core_ext/kernel'
-require 'active_support/core_ext/enumerable'
 require 'logger'
 require 'benchmark'
 
@@ -172,7 +171,7 @@ def start # rubocop:disable CyclomaticComplexity, PerceivedComplexity
             end
           end
 
-          count = @result.sum
+          count = @result[0] + @result[1]
 
           if count.zero?
             if self.class.exit_on_complete
diff --git a/lib/delayed_job.rb b/lib/delayed_job.rb
index dcddaf947..808831595 100644
--- a/lib/delayed_job.rb
+++ b/lib/delayed_job.rb
@@ -1,4 +1,3 @@
-require 'active_support'
 require 'delayed/compatibility'
 require 'delayed/exceptions'
 require 'delayed/message_sending'