diff --git a/Gemfile.lock b/Gemfile.lock
index aae738c..967cf71 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,6 +11,7 @@ GEM
     ZenTest (4.11.2)
     addressable (2.5.2)
       public_suffix (>= 2.0.2, < 4.0)
+    ast (2.4.1)
     autotest (4.4.6)
       ZenTest (>= 4.4.1)
     autotest-fsevent (0.2.14)
@@ -26,15 +27,21 @@ GEM
       ffi (>= 1.3.0)
     ffi (1.9.25)
     hashdiff (0.3.7)
-    json (2.1.0)
+    jaro_winkler (1.5.4)
+    json (2.3.1)
     method_source (0.9.0)
+    parallel (1.19.2)
+    parser (2.7.1.4)
+      ast (~> 2.4.1)
     pry (0.11.3)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     pry-byebug (3.6.0)
       byebug (~> 10.0)
       pry (~> 0.10)
+    psych (3.2.0)
     public_suffix (3.0.3)
+    rainbow (3.0.0)
     rake (12.0.0)
     rspec (3.8.0)
       rspec-core (~> 3.8.0)
@@ -49,11 +56,21 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.8.0)
     rspec-support (3.8.0)
+    rubocop (0.66.0)
+      jaro_winkler (~> 1.5.1)
+      parallel (~> 1.10)
+      parser (>= 2.5, != 2.5.1.1)
+      psych (>= 3.1.0)
+      rainbow (>= 2.2.2, < 4.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 1.6)
+    ruby-progressbar (1.10.1)
     safe_yaml (1.0.4)
     sys-uname (1.0.3)
       ffi (>= 1.0.0)
     typhoeus (1.3.0)
       ethon (>= 0.9.0)
+    unicode-display_width (1.5.0)
     vcr (3.0.3)
     webmock (1.24.6)
       addressable (>= 2.3.6)
@@ -72,6 +89,7 @@ DEPENDENCIES
   pry-byebug
   rake (~> 12.0.0)
   rspec (~> 3.6, >= 3.6.0)
+  rubocop (~> 0.66.0)
   vcr (~> 3.0, >= 3.0.1)
   webmock (~> 1.24, >= 1.24.3)