diff --git a/Gemfile.lock b/Gemfile.lock
index 0f1a6c1..32bc017 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -38,7 +38,8 @@ GEM
     rainbow (3.0.0)
     rake (12.3.3)
     regexp_parser (2.0.0)
-    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)
@@ -65,6 +66,7 @@ GEM
       parser (>= 2.7.1.5)
     ruby-progressbar (1.10.1)
     ruby2_keywords (0.0.5)
+    strscan (3.1.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     unicode-display_width (1.7.0)