diff --git a/lib/haml.rb b/lib/haml.rb
index a7f2a5e85..04f473d12 100644
--- a/lib/haml.rb
+++ b/lib/haml.rb
@@ -1,13 +1,14 @@
 # frozen_string_literal: true
-require 'haml/engine'
-require 'haml/error'
-require 'haml/version'
-require 'haml/template'
+require_relative 'haml/engine'
+require_relative 'haml/error'
+require_relative 'haml/version'
+require_relative 'haml/template'
 
 if File.basename($0) != 'haml'
   begin
     require 'rails'
-    require 'haml/railtie'
+
+    require_relative 'haml/railtie'
   rescue LoadError
   end
 end
diff --git a/lib/haml/attribute_builder.rb b/lib/haml/attribute_builder.rb
index fb3271e09..4aa0c3802 100644
--- a/lib/haml/attribute_builder.rb
+++ b/lib/haml/attribute_builder.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
-require 'haml/object_ref'
+require_relative 'object_ref'
 
 module Haml::AttributeBuilder
   class << self
diff --git a/lib/haml/attribute_compiler.rb b/lib/haml/attribute_compiler.rb
index 610cff696..cb9f107d6 100644
--- a/lib/haml/attribute_compiler.rb
+++ b/lib/haml/attribute_compiler.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
-require 'haml/attribute_builder'
-require 'haml/attribute_parser'
-require 'haml/ruby_expression'
+require_relative 'attribute_builder'
+require_relative 'attribute_parser'
+require_relative 'ruby_expression'
 
 module Haml
   # The list of boolean attributes. You may add custom attributes to this constant.
diff --git a/lib/haml/attribute_parser.rb b/lib/haml/attribute_parser.rb
index 8476e1bc4..3e026da00 100644
--- a/lib/haml/attribute_parser.rb
+++ b/lib/haml/attribute_parser.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
-require 'haml/ruby_expression'
+require_relative 'ruby_expression'
 
 module Haml
   class AttributeParser
diff --git a/lib/haml/cli.rb b/lib/haml/cli.rb
index 551d0004b..2ec779008 100644
--- a/lib/haml/cli.rb
+++ b/lib/haml/cli.rb
@@ -1,5 +1,6 @@
 # frozen_string_literal: true
-require 'haml'
+require_relative '../haml'
+
 require 'thor'
 
 module Haml
@@ -76,7 +77,9 @@ def generate_code(file)
       if options[:actionview]
         require 'action_view'
         require 'action_view/base'
-        require 'haml/rails_template'
+
+        require_relative 'rails_template'
+
         handler = Haml::RailsTemplate.new
         template = ActionView::Template.new(template, 'inline template', handler, { locals: [] })
         code = handler.call(template)
diff --git a/lib/haml/compiler.rb b/lib/haml/compiler.rb
index 51b22d4c4..735a0956f 100644
--- a/lib/haml/compiler.rb
+++ b/lib/haml/compiler.rb
@@ -1,12 +1,12 @@
 # frozen_string_literal: true
-require 'haml/compiler/children_compiler'
-require 'haml/compiler/comment_compiler'
-require 'haml/compiler/doctype_compiler'
-require 'haml/compiler/script_compiler'
-require 'haml/compiler/silent_script_compiler'
-require 'haml/compiler/tag_compiler'
-require 'haml/filters'
-require 'haml/identity'
+require_relative 'compiler/children_compiler'
+require_relative 'compiler/comment_compiler'
+require_relative 'compiler/doctype_compiler'
+require_relative 'compiler/script_compiler'
+require_relative 'compiler/silent_script_compiler'
+require_relative 'compiler/tag_compiler'
+require_relative 'filters'
+require_relative 'identity'
 
 module Haml
   class Compiler
diff --git a/lib/haml/compiler/children_compiler.rb b/lib/haml/compiler/children_compiler.rb
index a3a06ab21..2e492874c 100644
--- a/lib/haml/compiler/children_compiler.rb
+++ b/lib/haml/compiler/children_compiler.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
-require 'haml/temple_line_counter'
+require_relative '../temple_line_counter'
 
 module Haml
   class Compiler
diff --git a/lib/haml/compiler/script_compiler.rb b/lib/haml/compiler/script_compiler.rb
index dc1b18269..db0b8fcc6 100644
--- a/lib/haml/compiler/script_compiler.rb
+++ b/lib/haml/compiler/script_compiler.rb
@@ -1,7 +1,8 @@
 # frozen_string_literal: true
 require 'temple/static_analyzer'
-require 'haml/ruby_expression'
-require 'haml/string_splitter'
+
+require_relative '../ruby_expression'
+require_relative '../string_splitter'
 
 module Haml
   class Compiler
diff --git a/lib/haml/compiler/tag_compiler.rb b/lib/haml/compiler/tag_compiler.rb
index 89dc3b4af..5f42eae79 100644
--- a/lib/haml/compiler/tag_compiler.rb
+++ b/lib/haml/compiler/tag_compiler.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
-require 'haml/util'
-require 'haml/attribute_compiler'
-require 'haml/string_splitter'
+require_relative '../util'
+require_relative '../attribute_compiler'
+require_relative '../string_splitter'
 
 module Haml
   class Compiler
diff --git a/lib/haml/engine.rb b/lib/haml/engine.rb
index 6031f43ee..929452788 100644
--- a/lib/haml/engine.rb
+++ b/lib/haml/engine.rb
@@ -1,15 +1,16 @@
 # frozen_string_literal: true
 require 'temple'
-require 'haml/parser'
-require 'haml/compiler'
-require 'haml/html'
-require 'haml/string_splitter'
-require 'haml/escape'
-require 'haml/escape_any'
-require 'haml/force_escape'
-require 'haml/dynamic_merger'
-require 'haml/ambles'
-require 'haml/whitespace'
+
+require_relative 'parser'
+require_relative 'compiler'
+require_relative 'html'
+require_relative 'string_splitter'
+require_relative 'escape'
+require_relative 'escape_any'
+require_relative 'force_escape'
+require_relative 'dynamic_merger'
+require_relative 'ambles'
+require_relative 'whitespace'
 
 module Haml
   class Engine < Temple::Engine
diff --git a/lib/haml/escape.rb b/lib/haml/escape.rb
index 74e41cda2..b76bb61fc 100644
--- a/lib/haml/escape.rb
+++ b/lib/haml/escape.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
-require 'haml/util'
+require_relative 'util'
 
 module Haml
   class Escape < Temple::Filters::Escapable
diff --git a/lib/haml/escape_any.rb b/lib/haml/escape_any.rb
index 6eb613f52..24a864d95 100644
--- a/lib/haml/escape_any.rb
+++ b/lib/haml/escape_any.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
-require 'haml/escape'
+require_relative 'escape'
 
 module Haml
   # This module allows Temple::Filter to dispatch :fescape on `#compile`.
diff --git a/lib/haml/filters.rb b/lib/haml/filters.rb
index 9d91a5808..982e09326 100644
--- a/lib/haml/filters.rb
+++ b/lib/haml/filters.rb
@@ -1,20 +1,20 @@
 # frozen_string_literal: true
-require 'haml/filters/base'
-require 'haml/filters/text_base'
-require 'haml/filters/tilt_base'
-require 'haml/filters/coffee'
-require 'haml/filters/css'
-require 'haml/filters/erb'
-require 'haml/filters/escaped'
-require 'haml/filters/javascript'
-require 'haml/filters/less'
-require 'haml/filters/markdown'
-require 'haml/filters/plain'
-require 'haml/filters/preserve'
-require 'haml/filters/ruby'
-require 'haml/filters/sass'
-require 'haml/filters/scss'
-require 'haml/filters/cdata'
+require_relative 'filters/base'
+require_relative 'filters/text_base'
+require_relative 'filters/tilt_base'
+require_relative 'filters/coffee'
+require_relative 'filters/css'
+require_relative 'filters/erb'
+require_relative 'filters/escaped'
+require_relative 'filters/javascript'
+require_relative 'filters/less'
+require_relative 'filters/markdown'
+require_relative 'filters/plain'
+require_relative 'filters/preserve'
+require_relative 'filters/ruby'
+require_relative 'filters/sass'
+require_relative 'filters/scss'
+require_relative 'filters/cdata'
 
 module Haml
   class Filters
diff --git a/lib/haml/filters/base.rb b/lib/haml/filters/base.rb
index 4d344ef07..319740f63 100644
--- a/lib/haml/filters/base.rb
+++ b/lib/haml/filters/base.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
-require 'haml/util'
+require_relative '../util'
 
 module Haml
   class Filters
diff --git a/lib/haml/filters/plain.rb b/lib/haml/filters/plain.rb
index 16e8abbb6..ddc8a8952 100644
--- a/lib/haml/filters/plain.rb
+++ b/lib/haml/filters/plain.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
-require 'haml/string_splitter'
+require_relative '../string_splitter'
 
 module Haml
   class Filters
diff --git a/lib/haml/force_escape.rb b/lib/haml/force_escape.rb
index 9288dc056..07b1d8343 100644
--- a/lib/haml/force_escape.rb
+++ b/lib/haml/force_escape.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
-require 'haml/escape'
+require_relative 'escape'
 
 module Haml
   # This module allows Temple::Filter to dispatch :fescape on `#compile`.
diff --git a/lib/haml/parser.rb b/lib/haml/parser.rb
index 3357bb0eb..85659ad4a 100644
--- a/lib/haml/parser.rb
+++ b/lib/haml/parser.rb
@@ -2,8 +2,9 @@
 
 require 'ripper'
 require 'strscan'
-require 'haml/error'
-require 'haml/util'
+
+require_relative 'error'
+require_relative 'util'
 
 module Haml
   class Parser
diff --git a/lib/haml/rails_helpers.rb b/lib/haml/rails_helpers.rb
index c92b55107..b0533d7f5 100644
--- a/lib/haml/rails_helpers.rb
+++ b/lib/haml/rails_helpers.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: false
-require 'haml/helpers'
+require_relative 'helpers'
 
 # There are only helpers that depend on ActionView internals.
 module Haml
diff --git a/lib/haml/rails_template.rb b/lib/haml/rails_template.rb
index 30d74691c..cd97ac265 100644
--- a/lib/haml/rails_template.rb
+++ b/lib/haml/rails_template.rb
@@ -1,8 +1,9 @@
 # frozen_string_literal: true
 require 'temple'
-require 'haml/engine'
-require 'haml/rails_helpers'
-require 'haml/util'
+
+require_relative 'engine'
+require_relative 'rails_helpers'
+require_relative 'util'
 
 module Haml
   class RailsTemplate
diff --git a/lib/haml/railtie.rb b/lib/haml/railtie.rb
index faeb55063..a737a995b 100644
--- a/lib/haml/railtie.rb
+++ b/lib/haml/railtie.rb
@@ -4,7 +4,7 @@
 module Haml
   class Railtie < ::Rails::Railtie
     initializer :haml, before: :load_config_initializers do |app|
-      require 'haml/rails_template'
+      require_relative 'rails_template'
     end
   end
 end
diff --git a/lib/haml/template.rb b/lib/haml/template.rb
index 2e4f7cc99..f75fed1f8 100644
--- a/lib/haml/template.rb
+++ b/lib/haml/template.rb
@@ -1,7 +1,8 @@
 # frozen_string_literal: false
 require 'temple'
-require 'haml/engine'
-require 'haml/helpers'
+
+require_relative 'engine'
+require_relative 'helpers'
 
 module Haml
   Template = Temple::Templates::Tilt.create(