diff --git a/Gemfile.lock b/Gemfile.lock
index f1c406b..5554621 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -55,6 +55,7 @@ GEM
       rack (>= 1.0.0)
       rack-test (>= 0.5.4)
       xpath (~> 2.0)
+    concurrent-ruby (1.1.10)
     diff-lcs (1.2.5)
     enumerize (0.8.0)
       activesupport (>= 3.2)
@@ -67,7 +68,8 @@ GEM
       activemodel (>= 4.0.0, < 5)
       activerecord (>= 4.0.0, < 5)
     hike (1.2.3)
-    i18n (0.6.9)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     mail (2.5.4)
       mime-types (~> 1.16)
       treetop (~> 1.4.8)