diff --git a/Gemfile.lock b/Gemfile.lock
index 336ed65..5d2af6d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,10 +11,12 @@ GEM
       multi_json (~> 1.0)
     bouncy-castle-java (1.5.0146.1)
     chronic (0.6.7)
+    concurrent-ruby (1.1.10)
     delorean (2.0.0)
       chronic
     diff-lcs (1.1.3)
-    i18n (0.6.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jruby-openssl (0.7.7)
       bouncy-castle-java (>= 1.5.0146.1)
     multi_json (1.3.6)