diff --git a/Gemfile.lock b/Gemfile.lock
index b232ae3..216bd32 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -24,6 +24,7 @@ GEM
     coffee-script-source (1.10.0)
     colorator (1.1.0)
     colored (1.2)
+    concurrent-ruby (1.1.10)
     configure-s3-website (2.3.0)
       aws-sdk (~> 2)
       deep_merge (~> 1.0.0)
@@ -68,7 +69,8 @@ GEM
     html-pipeline (2.4.2)
       activesupport (>= 2)
       nokogiri (>= 1.4)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jekyll (3.2.1)
       colorator (~> 1.0)
       jekyll-sass-converter (~> 1.0)