diff --git a/Gemfile.lock b/Gemfile.lock
index 599c085..bf5f0b2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -16,6 +16,7 @@ GEM
     ast (2.3.0)
     bcrypt (3.1.11)
     builder (3.2.3)
+    concurrent-ruby (1.1.9)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
     diff-lcs (1.2.5)
@@ -27,7 +28,8 @@ GEM
     hashdiff (0.3.1)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     json (1.8.3)
     mime-types (3.1)
       mime-types-data (~> 3.2015)