diff --git a/Gemfile.lock b/Gemfile.lock
index 205da7f..518b196 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -18,9 +18,11 @@ GEM
     codeclimate-test-reporter (0.4.3)
       simplecov (>= 0.7.1, < 1.0.0)
     coderay (1.1.0)
+    concurrent-ruby (1.2.2)
     diff-lcs (1.2.5)
     docile (1.1.5)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     json (1.8.1)
     json-schema (2.5.0)
       addressable (~> 2.3)