diff --git a/Gemfile.lock b/Gemfile.lock
index e0a2f56..9bb9e44 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -26,7 +26,7 @@ GEM
       i18n (~> 0.7)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    ast (2.3.0)
+    ast (2.4.2)
     builder (3.2.3)
     byebug (9.0.6)
     codeclimate-test-reporter (1.0.5)
@@ -37,7 +37,7 @@ GEM
     docile (1.1.5)
     erubis (2.7.0)
     i18n (0.7.0)
-    json (2.0.3)
+    json (2.6.3)
     loofah (2.0.3)
       nokogiri (>= 1.5.9)
     method_source (0.8.2)
@@ -45,9 +45,9 @@ GEM
     minitest (5.10.1)
     nokogiri (1.7.0.1)
       mini_portile2 (~> 2.1.0)
-    parser (2.3.3.1)
-      ast (~> 2.2)
-    powerpack (0.1.1)
+    parallel (1.23.0)
+    parser (3.2.2.0)
+      ast (~> 2.4.1)
     pry (0.10.4)
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
@@ -60,9 +60,11 @@ GEM
       nokogiri (~> 1.6)
     rails-html-sanitizer (1.0.3)
       loofah (~> 2.0)
-    rainbow (2.2.1)
+    rainbow (3.1.1)
     rake (12.0.0)
+    regexp_parser (2.8.0)
     request_store (1.3.2)
+    rexml (3.2.5)
     rspec (3.5.0)
       rspec-core (~> 3.5.0)
       rspec-expectations (~> 3.5.0)
@@ -76,15 +78,21 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.5.0)
     rspec-support (3.5.0)
-    rubocop (0.47.1)
-      parser (>= 2.3.3.1, < 3.0)
-      powerpack (~> 0.1)
-      rainbow (>= 1.99.1, < 3.0)
+    rubocop (1.50.2)
+      json (~> 2.3)
+      parallel (~> 1.10)
+      parser (>= 3.2.0.0)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.28.0, < 2.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (~> 1.0, >= 1.0.1)
+      unicode-display_width (>= 2.4.0, < 3.0)
+    rubocop-ast (1.28.0)
+      parser (>= 3.2.1.0)
     rubocop-rspec (1.10.0)
       rubocop (>= 0.42.0)
-    ruby-progressbar (1.8.1)
+    ruby-progressbar (1.13.0)
     simplecov (0.13.0)
       docile (~> 1.1.0)
       json (>= 1.8, < 3)
@@ -97,7 +105,7 @@ GEM
       thread_safe (~> 0.1)
     tzinfo-data (1.2017.1)
       tzinfo (>= 1.0.0)
-    unicode-display_width (1.1.3)
+    unicode-display_width (2.4.2)
 
 PLATFORMS
   ruby
@@ -112,7 +120,7 @@ DEPENDENCIES
   rack-test (~> 0.6)
   rake (~> 12.0)
   rspec (~> 3.5)
-  rubocop (~> 0.46)
+  rubocop (~> 1.50)
   rubocop-rspec (~> 1.9)
   simplecov (~> 0.12)
   timecop (~> 0.8)
diff --git a/amaysim_logger.gemspec b/amaysim_logger.gemspec
index b0b35ed..3214e9b 100644
--- a/amaysim_logger.gemspec
+++ b/amaysim_logger.gemspec
@@ -37,7 +37,7 @@ Gem::Specification.new do |gem|
   gem.add_development_dependency 'rack-test', '~> 0.6'
   gem.add_development_dependency 'simplecov', '~> 0.12'
   gem.add_development_dependency 'pry', '~> 0.10'
-  gem.add_development_dependency 'rubocop', '~> 0.46'
+  gem.add_development_dependency 'rubocop', '~> 1.50'
   gem.add_development_dependency 'rubocop-rspec', '~> 1.9'
   gem.add_development_dependency 'codeclimate-test-reporter', '~> 1.0'
   gem.add_development_dependency 'tzinfo-data', '~> 1.2017'