diff --git a/Gemfile.lock b/Gemfile.lock
index cfca607..da315d2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -38,7 +38,8 @@ GEM
     regexp_parser (2.1.1)
     reline (0.2.6)
       io-console (~> 0.5)
-    rexml (3.2.5)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rspec (3.10.0)
       rspec-core (~> 3.10.0)
       rspec-expectations (~> 3.10.0)
@@ -66,6 +67,7 @@ GEM
     ruby-osc (1.0.0)
       eventmachine (~> 1.2)
     ruby-progressbar (1.11.0)
+    strscan (3.1.0)
     tty-which (0.4.2)
     unicode-display_width (2.0.0)
     yard (0.9.26)