diff --git a/Gemfile.lock b/Gemfile.lock
index 806d618..c87922a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -35,7 +35,8 @@ GEM
       http-cookie (>= 1.0.2, < 2.0)
       mime-types (>= 1.16, < 4.0)
       netrc (~> 0.8)
-    rexml (3.2.5)
+    rexml (3.3.3)
+      strscan
     rspec (3.11.0)
       rspec-core (~> 3.11.0)
       rspec-expectations (~> 3.11.0)
@@ -63,6 +64,7 @@ GEM
     rubocop-rspec (2.10.0)
       rubocop (~> 1.19)
     ruby-progressbar (1.11.0)
+    strscan (3.1.0)
     timecop (0.9.5)
     unf (0.1.4)
       unf_ext