diff --git a/Gemfile.lock b/Gemfile.lock
index c71795c..f7a092b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -23,7 +23,6 @@ GEM
       descendants_tracker (~> 0.0.4)
       ice_nine (~> 0.11.0)
       thread_safe (~> 0.3, >= 0.3.1)
-    coderay (1.1.3)
     coercible (1.0.0)
       descendants_tracker (~> 0.0.1)
     concurrent-ruby (1.1.10)
@@ -34,51 +33,15 @@ GEM
     era_ja (1.1.0)
     factory_bot (6.2.1)
       activesupport (>= 5.0.0)
-    ffi (1.15.5)
-    formatador (1.1.0)
-    guard (2.18.0)
-      formatador (>= 0.2.4)
-      listen (>= 2.7, < 4.0)
-      lumberjack (>= 1.0.12, < 2.0)
-      nenv (~> 0.1)
-      notiffany (~> 0.0)
-      pry (>= 0.13.0)
-      shellany (~> 0.0)
-      thor (>= 0.18.1)
-    guard-bundler (0.1.2)
-      guard (>= 0.2.2)
-    guard-compat (1.2.1)
-    guard-rspec (4.7.3)
-      guard (~> 2.1)
-      guard-compat (~> 1.1)
-      rspec (>= 2.99.0, < 4.0)
-    guard-rubocop (1.5.0)
-      guard (~> 2.0)
-      rubocop (< 2.0)
     i18n (1.12.0)
       concurrent-ruby (~> 1.0)
     ice_nine (0.11.2)
-    listen (3.7.1)
-      rb-fsevent (~> 0.10, >= 0.10.3)
-      rb-inotify (~> 0.9, >= 0.9.10)
-    lumberjack (1.2.8)
-    method_source (1.0.0)
     minitest (5.17.0)
-    nenv (0.3.0)
-    notiffany (0.1.3)
-      nenv (~> 0.1)
-      shellany (~> 0.0)
     parallel (1.22.1)
     parser (3.1.2.0)
       ast (~> 2.4.1)
-    pry (0.14.1)
-      coderay (~> 1.1)
-      method_source (~> 1.0)
     rainbow (3.1.1)
     rake (13.0.1)
-    rb-fsevent (0.11.1)
-    rb-inotify (0.10.1)
-      ffi (~> 1.0)
     regexp_parser (2.3.1)
     rexml (3.2.8)
       strscan (>= 3.0.9)
@@ -107,9 +70,7 @@ GEM
     rubocop-ast (1.17.0)
       parser (>= 3.1.1.0)
     ruby-progressbar (1.11.0)
-    shellany (0.0.1)
     strscan (3.1.0)
-    thor (1.2.1)
     thread_safe (0.3.6)
     timeliness (0.4.3)
     tzinfo (2.0.5)
@@ -129,13 +90,10 @@ PLATFORMS
 DEPENDENCIES
   bundler (>= 2.2.13)
   factory_bot
-  guard
-  guard-bundler
-  guard-rspec
-  guard-rubocop
   kirico!
   rake (~> 13.0)
   rspec
+  rubocop
 
 BUNDLED WITH
    2.3.8
diff --git a/Guardfile b/Guardfile
deleted file mode 100644
index 9938d71..0000000
--- a/Guardfile
+++ /dev/null
@@ -1,15 +0,0 @@
-guard :rspec, cmd: 'bundle exec rspec', failed_mode: :focus do
-  watch(%r{^spec/.+_spec\.rb$})
-  watch(%r{^lib/(.+)\.rb$}) { |m| "spec/#{m[1]}_spec.rb" }
-  watch(%r{^spec/factories/(.+)\.rb$}) { |m| "spec/kirico/models/#{m[1]}_spec.rb" }
-  watch('spec/spec_helper.rb') { 'spec' }
-end
-
-guard :bundler do
-  watch('Gemfile')
-  watch(/^.+\.gemspec/)
-end
-
-guard :rubocop, all_on_start: true, cli: ['-D', '--format', 'clang'] do
-  watch(/.+\.rb$/)
-end
diff --git a/kirico.gemspec b/kirico.gemspec
index b5d5503..414ee43 100644
--- a/kirico.gemspec
+++ b/kirico.gemspec
@@ -36,10 +36,7 @@ Gem::Specification.new do |spec|
 
   spec.add_development_dependency 'bundler', '>= 2.2.13'
   spec.add_development_dependency 'factory_bot'
-  spec.add_development_dependency 'guard'
-  spec.add_development_dependency 'guard-bundler'
-  spec.add_development_dependency 'guard-rspec'
-  spec.add_development_dependency 'guard-rubocop'
+  spec.add_development_dependency 'rubocop'
   spec.add_development_dependency 'rake', '~> 13.0'
   spec.add_development_dependency 'rspec'
 end