diff --git a/Gemfile.lock b/Gemfile.lock
index c0b3394..d133ad0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,7 +7,7 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    ast (2.4.1)
+    ast (2.4.2)
     childprocess (4.0.0)
     codecov (0.2.12)
       json
@@ -25,39 +25,39 @@ GEM
       childprocess (>= 0.6.3, < 5)
       iniparse (~> 1.4)
     parallel (1.20.1)
-    parser (2.7.2.0)
+    parser (3.0.2.0)
       ast (~> 2.4.1)
     pry (0.13.1)
       coderay (~> 1.1)
       method_source (~> 1.0)
     rainbow (3.0.0)
     rake (12.3.3)
-    regexp_parser (2.0.0)
-    rexml (3.2.4)
-    rubocop (1.6.1)
+    regexp_parser (2.1.1)
+    rexml (3.2.5)
+    rubocop (1.18.3)
       parallel (~> 1.10)
-      parser (>= 2.7.1.5)
+      parser (>= 3.0.0.0)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 1.8, < 3.0)
       rexml
-      rubocop-ast (>= 1.2.0, < 2.0)
+      rubocop-ast (>= 1.7.0, < 2.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 1.4.0, < 2.0)
-    rubocop-ast (1.3.0)
-      parser (>= 2.7.1.5)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.7.0)
+      parser (>= 3.0.1.1)
     rubocop-minitest (0.10.1)
       rubocop (>= 0.87)
     rubocop-performance (1.9.1)
       rubocop (>= 0.90.0, < 2.0)
       rubocop-ast (>= 0.4.0)
-    ruby-progressbar (1.10.1)
+    ruby-progressbar (1.11.0)
     simplecov (0.20.0)
       docile (~> 1.1)
       simplecov-html (~> 0.11)
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.2)
-    unicode-display_width (1.7.0)
+    unicode-display_width (2.0.0)
     vcr (6.0.0)
 
 PLATFORMS