diff --git a/Gemfile.lock b/Gemfile.lock
index a3d9c18..04db1b2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -90,7 +90,8 @@ GEM
       rainbow (>= 2.0, < 4.0)
       rexml (~> 3.1)
     regexp_parser (2.9.0)
-    rexml (3.2.6)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rspec (3.13.0)
       rspec-core (~> 3.13.0)
       rspec-expectations (~> 3.13.0)
@@ -142,6 +143,7 @@ GEM
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.4)
+    strscan (3.1.0)
     thor (1.3.0)
     thor_nested_subcommand (1.0.8)
     tzinfo (2.0.6)