diff --git a/Gemfile.lock b/Gemfile.lock
index d2cd842..8dc01e0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -16,12 +16,14 @@ GEM
     colorator (0.1)
     commander (4.1.6)
       highline (~> 1.6.11)
+    concurrent-ruby (1.1.10)
     execjs (2.0.2)
     fast-stemmer (1.0.2)
     ffi (1.9.3)
     highline (1.6.21)
     hike (1.2.3)
-    i18n (0.6.9)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jekyll (1.4.3)
       classifier (~> 1.3)
       colorator (~> 0.1)