diff --git a/Gemfile.lock b/Gemfile.lock
index 784c64b..944baeb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -21,9 +21,11 @@ GEM
       tzinfo (~> 0.3.37)
     ansi (1.5.0)
     builder (3.1.4)
+    concurrent-ruby (1.1.10)
     docile (1.1.5)
     erubis (2.7.0)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     json (1.8.3)
     minitest (4.7.5)
     minitest_should (0.3.1)