diff --git a/Gemfile.lock b/Gemfile.lock
index f908f7c..d359fcd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -10,6 +10,7 @@ GEM
     addressable (2.5.0)
       public_suffix (~> 2.0, >= 2.0.2)
     colorator (1.1.0)
+    concurrent-ruby (1.1.10)
     em-websocket (0.5.1)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
@@ -17,7 +18,8 @@ GEM
     ffi (1.9.14)
     forwardable-extended (2.6.0)
     http_parser.rb (0.6.0)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jekyll (3.8.3)
       addressable (~> 2.4)
       colorator (~> 1.0)