diff --git a/Gemfile.lock b/Gemfile.lock
index cfd1ae0..04db19b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -34,7 +34,8 @@ GEM
     regexp_parser (2.8.1)
     rerun (0.14.0)
       listen (~> 3.0)
-    rexml (3.2.5)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rspec (3.12.0)
       rspec-core (~> 3.12.0)
       rspec-expectations (~> 3.12.0)
@@ -62,6 +63,7 @@ GEM
     rubocop-ast (1.29.0)
       parser (>= 3.2.1.0)
     ruby-progressbar (1.13.0)
+    strscan (3.1.0)
     thin (1.8.2)
       daemons (~> 1.0, >= 1.0.9)
       eventmachine (~> 1.0, >= 1.0.4)