diff --git a/Gemfile.lock b/Gemfile.lock
index 011120e..a9936ab 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -43,6 +43,7 @@ GEM
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rainbow (3.0.0)
+    rexml (3.2.4)
     rspec (3.9.0)
       rspec-core (~> 3.9.0)
       rspec-expectations (~> 3.9.0)
@@ -56,11 +57,12 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.9.0)
     rspec-support (3.9.0)
-    rubocop (0.79.0)
+    rubocop (0.80.0)
       jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
       parser (>= 2.7.0.1)
       rainbow (>= 2.2.2, < 4.0)
+      rexml
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 1.7)
     rubocop-performance (1.5.2)