diff --git a/Gemfile.lock b/Gemfile.lock
index b4cf332..3920992 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -18,7 +18,8 @@ GEM
     rainbow (3.1.1)
     rake (13.0.6)
     regexp_parser (2.6.0)
-    rexml (3.2.5)
+    rexml (3.3.6)
+      strscan
     rspec (3.11.0)
       rspec-core (~> 3.11.0)
       rspec-expectations (~> 3.11.0)
@@ -59,6 +60,7 @@ GEM
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.4)
     stringio (3.0.4)
+    strscan (3.1.0)
     unicode-display_width (2.3.0)
 
 PLATFORMS