diff --git a/History.md b/History.md
index 5a81809..85a4d7e 100644
--- a/History.md
+++ b/History.md
@@ -1,6 +1,7 @@
 # Liquid Change Log
 
 ## 4.0.0 / not yet released / branch "master"
+
 ### Changed
 * Add sort_natural filter (#554) [Martin Hanzel, arthanzel]
 * Add forloop.parentloop as a reference to the parent loop (#520) [Justin Li, pushrax]
@@ -8,6 +9,7 @@
 * Add concat filter to concatenate arrays (#429) [Diogo Beato, dvbeato]
 * Ruby 1.9 support dropped (#491) [Justin Li, pushrax]
 * Liquid::Template.file_system's read_template_file method is no longer passed the context. (#441) [James Reid-Smith, sunblaze]
+* Remove support for `liquid_methods`
 
 ### Fixed
 * Fix naming of the "context variable" when dynamically including a template (#559) [Justin Li, pushrax]
diff --git a/lib/liquid.rb b/lib/liquid.rb
index 7bf8de1..9724aac 100644
--- a/lib/liquid.rb
+++ b/lib/liquid.rb
@@ -67,7 +67,6 @@ require 'liquid/resource_limits'
 require 'liquid/template'
 require 'liquid/standardfilters'
 require 'liquid/condition'
-require 'liquid/module_ex'
 require 'liquid/utils'
 require 'liquid/token'
 
diff --git a/lib/liquid/module_ex.rb b/lib/liquid/module_ex.rb
deleted file mode 100644
index 5b394d2..0000000
--- a/lib/liquid/module_ex.rb
+++ /dev/null
@@ -1,64 +0,0 @@
-# Copyright 2007 by Domizio Demichelis
-# This library is free software. It may be used, redistributed and/or modified
-# under the same terms as Ruby itself
-#
-# This extension is used in order to expose the object of the implementing class
-# to liquid as it were a Drop. It also limits the liquid-callable methods of the instance
-# to the allowed method passed with the liquid_methods call
-# Example:
-#
-#   class SomeClass
-#     liquid_methods :an_allowed_method
-#
-#     def an_allowed_method
-#       'this comes from an allowed method'
-#     end
-#
-#     def unallowed_method
-#       'this will never be an output'
-#     end
-#   end
-#
-# if you want to extend the drop to other methods you can defines more methods
-# in the class <YourClass>::LiquidDropClass
-#
-#   class SomeClass::LiquidDropClass
-#     def another_allowed_method
-#       'and this from another allowed method'
-#     end
-#   end
-#
-#
-# usage:
-#   @something = SomeClass.new
-#
-# template:
-#   {{something.an_allowed_method}}{{something.unallowed_method}} {{something.another_allowed_method}}
-#
-# output:
-#   'this comes from an allowed method and this from another allowed method'
-#
-# You can also chain associations, by adding the liquid_method call in the
-# association models.
-#
-class Module
-  def liquid_methods(*allowed_methods)
-    drop_class = eval "class #{self}::LiquidDropClass < Liquid::Drop; self; end"
-
-    define_method :to_liquid do
-      drop_class.new(self)
-    end
-
-    drop_class.class_eval do
-      def initialize(object)
-        @object = object
-      end
-
-      allowed_methods.each do |sym|
-        define_method sym do
-          @object.send sym
-        end
-      end
-    end
-  end
-end
diff --git a/test/integration/template_test.rb b/test/integration/template_test.rb
index 977101a..a44f8c1 100644
--- a/test/integration/template_test.rb
+++ b/test/integration/template_test.rb
@@ -15,12 +15,10 @@ class TemplateContextDrop < Liquid::Drop
   end
 end
 
-class SomethingWithLength
+class SomethingWithLength < Liquid::Drop
   def length
     nil
   end
-
-  liquid_methods :length
 end
 
 class ErroneousDrop < Liquid::Drop
diff --git a/test/unit/module_ex_unit_test.rb b/test/unit/module_ex_unit_test.rb
deleted file mode 100644
index 9a8ec2e..0000000
--- a/test/unit/module_ex_unit_test.rb
+++ /dev/null
@@ -1,90 +0,0 @@
-require 'test_helper'
-
-class TestClassA
-  liquid_methods :allowedA, :chainedB
-  def allowedA
-    'allowedA'
-  end
-
-  def restrictedA
-    'restrictedA'
-  end
-
-  def chainedB
-    TestClassB.new
-  end
-end
-
-class TestClassB
-  liquid_methods :allowedB, :chainedC
-  def allowedB
-    'allowedB'
-  end
-
-  def chainedC
-    TestClassC.new
-  end
-end
-
-class TestClassC
-  liquid_methods :allowedC
-  def allowedC
-    'allowedC'
-  end
-end
-
-class TestClassC::LiquidDropClass
-  def another_allowedC
-    'another_allowedC'
-  end
-end
-
-class ModuleExUnitTest < Minitest::Test
-  include Liquid
-
-  def setup
-    @a = TestClassA.new
-    @b = TestClassB.new
-    @c = TestClassC.new
-  end
-
-  def test_should_create_LiquidDropClass
-    assert TestClassA::LiquidDropClass
-    assert TestClassB::LiquidDropClass
-    assert TestClassC::LiquidDropClass
-  end
-
-  def test_should_respond_to_liquid
-    assert @a.respond_to?(:to_liquid)
-    assert @b.respond_to?(:to_liquid)
-    assert @c.respond_to?(:to_liquid)
-  end
-
-  def test_should_return_LiquidDropClass_object
-    assert @a.to_liquid.is_a?(TestClassA::LiquidDropClass)
-    assert @b.to_liquid.is_a?(TestClassB::LiquidDropClass)
-    assert @c.to_liquid.is_a?(TestClassC::LiquidDropClass)
-  end
-
-  def test_should_respond_to_liquid_methods
-    assert @a.to_liquid.respond_to?(:allowedA)
-    assert @a.to_liquid.respond_to?(:chainedB)
-    assert @b.to_liquid.respond_to?(:allowedB)
-    assert @b.to_liquid.respond_to?(:chainedC)
-    assert @c.to_liquid.respond_to?(:allowedC)
-    assert @c.to_liquid.respond_to?(:another_allowedC)
-  end
-
-  def test_should_not_respond_to_restricted_methods
-    assert ! @a.to_liquid.respond_to?(:restricted)
-  end
-
-  def test_should_use_regular_objects_as_drops
-    assert_template_result 'allowedA', "{{ a.allowedA }}", 'a' => @a
-    assert_template_result 'allowedB', "{{ a.chainedB.allowedB }}", 'a' => @a
-    assert_template_result 'allowedC', "{{ a.chainedB.chainedC.allowedC }}", 'a' => @a
-    assert_template_result 'another_allowedC', "{{ a.chainedB.chainedC.another_allowedC }}", 'a' => @a
-    assert_template_result '', "{{ a.restricted }}", 'a' => @a
-    assert_template_result '', "{{ a.unknown }}", 'a' => @a
-  end
-end # ModuleExTest