diff --git a/Gemfile.lock b/Gemfile.lock
index d1f0355..d017dcf 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -42,7 +42,8 @@ GEM
     rainbow (3.0.0)
     rake (13.0.3)
     regexp_parser (2.1.1)
-    rexml (3.2.5)
+    rexml (3.3.3)
+      strscan
     rspec (3.10.0)
       rspec-core (~> 3.10.0)
       rspec-expectations (~> 3.10.0)
@@ -68,6 +69,7 @@ GEM
     rubocop-ast (1.7.0)
       parser (>= 3.0.1.1)
     ruby-progressbar (1.11.0)
+    strscan (3.1.0)
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.7)