diff --git a/Gemfile.lock b/Gemfile.lock
index 047f0ae..327fa83 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -33,7 +33,8 @@ GEM
     rainbow (3.1.1)
     rake (13.0.6)
     regexp_parser (2.5.0)
-    rexml (3.2.5)
+    rexml (3.3.6)
+      strscan
     rspec (3.11.0)
       rspec-core (~> 3.11.0)
       rspec-expectations (~> 3.11.0)
@@ -62,6 +63,7 @@ GEM
       rubocop (~> 1.19)
     ruby-progressbar (1.11.0)
     sqlite3 (1.4.4)
+    strscan (3.1.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     unicode-display_width (2.1.0)