diff --git a/Gemfile.lock b/Gemfile.lock
index 2ebd871..cf053da 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -82,7 +82,8 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     regexp_parser (2.8.1)
-    rexml (3.2.5)
+    rexml (3.2.9)
+      strscan
     rspec (3.12.0)
       rspec-core (~> 3.12.0)
       rspec-expectations (~> 3.12.0)
@@ -127,6 +128,7 @@ GEM
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.4)
+    strscan (3.1.0)
     thor (1.2.2)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)