diff --git a/.rubocop.yml b/.rubocop.yml
index a83a45b4..27146e27 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -239,5 +239,8 @@ Lint/EmptyWhen:
 Style/FormatStringToken:
   EnforcedStyle: unannotated
 
+Bundler/OrderedGems:
+  Enabled: false
+
 Layout/EmptyLineAfterGuardClause:
   Enabled: false
diff --git a/ChangeLog.md b/ChangeLog.md
index 5c4869d0..bdaeeb5d 100755
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,6 +1,15 @@
 更新履歴 - ChangeLog
 ====================
 
+3.3.1: 2018/xx/xx
+------------------
+#### 追加機能
+- 起動速度を向上させる Bootsnap を利用できるようにしました
+  - gem install bootsnap を実行し、環境変数 NAROU_ENABLE_BOOTSNAP に真を設定
+    すると有効になります。(※Bootsnap は Windows では動作しません)
+  - 約20％くらい起動速度が速くなります
+
+
 3.3.0: 2018/xx/xx
 ------------------
 #### 追加機能
diff --git a/Gemfile b/Gemfile
index 93d3ce85..86775b71 100644
--- a/Gemfile
+++ b/Gemfile
@@ -16,3 +16,4 @@ gem "better_errors"
 gem "binding_of_caller"
 gem "awesome_print"
 gem "simplecov", require: false, group: :test
+gem "bootsnap", require: false
diff --git a/Gemfile.lock b/Gemfile.lock
index 4b026714..08c6337b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -35,9 +35,14 @@ GEM
       rack (>= 0.9.0)
     binding_of_caller (0.8.0)
       debug_inspector (>= 0.0.1)
+    bootsnap (1.3.2)
+      msgpack (~> 1.0)
+    bootsnap (1.3.2-java)
+      msgpack (~> 1.0)
     byebug (10.0.2)
     coderay (1.1.2)
     concurrent-ruby (1.0.5)
+    concurrent-ruby (1.0.5-java)
     debug_inspector (0.0.3)
     diff-lcs (1.3)
     docile (1.3.1)
@@ -59,6 +64,8 @@ GEM
       mime-types-data (~> 3.2015)
     mime-types-data (3.2018.0812)
     minitest (5.11.3)
+    msgpack (1.2.4)
+    msgpack (1.2.4-java)
     multi_json (1.13.1)
     open_uri_redirections (0.2.1)
     pony (1.12)
@@ -125,6 +132,7 @@ GEM
     systemu (2.6.5)
     termcolorlight (1.1.1)
     thread_safe (0.3.6)
+    thread_safe (0.3.6-java)
     tilt (2.0.8)
     timecop (0.9.1)
     tzinfo (1.2.5)
@@ -139,6 +147,7 @@ DEPENDENCIES
   awesome_print
   better_errors
   binding_of_caller
+  bootsnap
   narou!
   pry
   pry-byebug
diff --git a/config/bootsnap_setup.rb b/config/bootsnap_setup.rb
new file mode 100644
index 00000000..4f19994b
--- /dev/null
+++ b/config/bootsnap_setup.rb
@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+if ENV["NAROU_ENABLE_BOOTSNAP"]
+  require "bootsnap"
+  Bootsnap.setup(
+    cache_dir:            "tmp/cache",
+    development_mode:     false,
+    load_path_cache:      true,
+    autoload_paths_cache: false,
+    disable_trace:        false,
+    compile_cache_iseq:   true,
+    compile_cache_yaml:   true
+  )
+end
diff --git a/narou.gemspec b/narou.gemspec
index ad87823c..af671dc5 100644
--- a/narou.gemspec
+++ b/narou.gemspec
@@ -109,4 +109,3 @@ Gem::Specification.new do |gem|
   gem.add_runtime_dependency 'activesupport', '~> 5.2'
   gem.add_runtime_dependency 'unicode-display_width', '~> 1.4'
 end
-
diff --git a/narou.rb b/narou.rb
index 87da4c13..53e4b95a 100644
--- a/narou.rb
+++ b/narou.rb
@@ -7,6 +7,8 @@
 # Copyright 2013 whiteleaf. All rights reserved.
 #
 
+require_relative "config/bootsnap_setup"
+
 require_relative "lib/extension"
 require_relative "lib/extensions/monkey_patches"
 require_relative "lib/backtracer"