diff --git a/Gemfile.lock b/Gemfile.lock
index 41e4f21..b975c36 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -42,7 +42,8 @@ GEM
     rainbow (3.1.1)
     rake (13.0.6)
     regexp_parser (2.8.1)
-    rexml (3.2.5)
+    rexml (3.3.6)
+      strscan
     rspec (3.12.0)
       rspec-core (~> 3.12.0)
       rspec-expectations (~> 3.12.0)
@@ -76,6 +77,7 @@ GEM
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.4)
+    strscan (3.1.0)
     ttfunk (1.7.0)
     unicode-display_width (2.4.2)