diff --git a/Gemfile.lock b/Gemfile.lock
index 5fd86b9..61d056e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -15,6 +15,7 @@ GEM
     coffee-script-source (1.12.2)
     colorator (1.1.0)
     colored (1.2)
+    concurrent-ruby (1.1.10)
     ethon (0.10.1)
       ffi (>= 1.3.0)
     execjs (2.7.0)
@@ -85,7 +86,8 @@ GEM
       parallel (~> 1.3)
       typhoeus (~> 0.7)
       yell (~> 2.0)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jekyll (3.3.1)
       addressable (~> 2.4)
       colorator (~> 1.0)