diff --git a/Gemfile b/Gemfile
index 43867df..bacbd69 100644
--- a/Gemfile
+++ b/Gemfile
@@ -12,7 +12,7 @@ group :development do
   gem 'guard-rspec', '~> 4.7.3'
   gem 'listen', '~> 3.1.5'
   gem 'rspec', '~> 3.8.0'
-  gem 'rubocop', '~> 0.65.0'
+  gem 'rubocop', '~> 1.18.4'
 end
 
 group :debug do
diff --git a/Gemfile.lock b/Gemfile.lock
index 8233cc7..bcc1a1c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,7 +7,7 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    ast (2.4.0)
+    ast (2.4.2)
     byebug (11.0.0)
     coderay (1.1.2)
     coveralls (0.8.22)
@@ -36,7 +36,6 @@ GEM
       guard-compat (~> 1.1)
       rspec (>= 2.99.0, < 4.0)
     hashie (3.6.0)
-    jaro_winkler (1.5.2)
     json (2.1.0)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
@@ -48,22 +47,22 @@ GEM
     notiffany (0.1.1)
       nenv (~> 0.1)
       shellany (~> 0.0)
-    parallel (1.14.0)
-    parser (2.6.0.0)
-      ast (~> 2.4.0)
-    powerpack (0.1.2)
+    parallel (1.20.1)
+    parser (3.0.2.0)
+      ast (~> 2.4.1)
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     pry-byebug (3.7.0)
       byebug (~> 11.0)
       pry (~> 0.10)
-    psych (3.1.0)
     rainbow (3.0.0)
     rake (12.3.2)
     rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
+    regexp_parser (2.1.1)
+    rexml (3.2.5)
     rspec (3.8.0)
       rspec-core (~> 3.8.0)
       rspec-expectations (~> 3.8.0)
@@ -77,16 +76,18 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.8.0)
     rspec-support (3.8.0)
-    rubocop (0.65.0)
-      jaro_winkler (~> 1.5.1)
+    rubocop (1.18.4)
       parallel (~> 1.10)
-      parser (>= 2.5, != 2.5.1.1)
-      powerpack (~> 0.1)
-      psych (>= 3.1.0)
+      parser (>= 3.0.0.0)
       rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml
+      rubocop-ast (>= 1.8.0, < 2.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (~> 1.4.0)
-    ruby-progressbar (1.10.0)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.8.0)
+      parser (>= 3.0.1.1)
+    ruby-progressbar (1.11.0)
     ruby_dep (1.5.0)
     shellany (0.0.1)
     simplecov (0.16.1)
@@ -98,7 +99,7 @@ GEM
       tins (~> 1.0)
     thor (0.19.4)
     tins (1.16.3)
-    unicode-display_width (1.4.1)
+    unicode-display_width (2.0.0)
 
 PLATFORMS
   ruby
@@ -115,7 +116,7 @@ DEPENDENCIES
   pry-byebug (~> 3.7.0)
   rake (~> 12.3.1)
   rspec (~> 3.8.0)
-  rubocop (~> 0.65.0)
+  rubocop (~> 1.18.4)
 
 BUNDLED WITH
    1.16.2