diff --git a/Gemfile.lock b/Gemfile.lock
index f311858..41b16dd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -34,7 +34,8 @@ GEM
     redis-client (0.17.0)
       connection_pool
     regexp_parser (2.8.1)
-    rexml (3.2.6)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rspec (3.12.0)
       rspec-core (~> 3.12.0)
       rspec-expectations (~> 3.12.0)
@@ -79,6 +80,7 @@ GEM
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.4)
+    strscan (3.1.0)
     tty-color (0.6.0)
     tty-cursor (0.7.1)
     tty-prompt (0.23.1)