diff --git a/Gemfile.lock b/Gemfile.lock
index 3fb6834..99ea7a0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,6 +13,7 @@ GEM
       execjs
     coffee-script-source (1.10.0)
     colorator (0.1)
+    concurrent-ruby (1.1.10)
     ethon (0.9.0)
       ffi (>= 1.3.0)
     execjs (2.7.0)
@@ -50,7 +51,8 @@ GEM
     html-pipeline (2.4.2)
       activesupport (>= 2)
       nokogiri (>= 1.4)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jekyll (3.1.6)
       colorator (~> 0.1)
       jekyll-sass-converter (~> 1.0)