diff --git a/Gemfile.lock b/Gemfile.lock
index 5956eec..42d6687 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -21,11 +21,13 @@ GEM
       execjs
     coffee-script-source (1.7.0)
     colorator (0.1)
+    concurrent-ruby (1.1.10)
     execjs (2.0.2)
     fast-stemmer (1.0.2)
     ffi (1.12.2)
     ffi (1.12.2-x86-mingw32)
-    i18n (0.6.9)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jekyll (2.0.2)
       classifier (~> 1.3)
       colorator (~> 0.1)