diff --git a/Gemfile.lock b/Gemfile.lock
index 8dc9389..d8c26cf 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -16,7 +16,8 @@ GEM
     rainbow (3.1.1)
     rake (13.0.3)
     regexp_parser (2.6.1)
-    rexml (3.2.5)
+    rexml (3.3.6)
+      strscan
     rspec (3.9.0)
       rspec-core (~> 3.9.0)
       rspec-expectations (~> 3.9.0)
@@ -49,6 +50,7 @@ GEM
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.13.0)
     simplecov_json_formatter (0.1.4)
+    strscan (3.1.0)
     unicode-display_width (2.4.2)
 
 PLATFORMS