diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
index c990e8e..5207e5a 100644
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -14,6 +14,7 @@ GEM
       execjs
     coffee-script-source (1.12.2)
     colorator (1.1.0)
+    concurrent-ruby (1.1.10)
     ethon (0.10.1)
       ffi (>= 1.3.0)
     execjs (2.7.0)
@@ -74,7 +75,8 @@ GEM
     html-pipeline (2.5.0)
       activesupport (>= 2)
       nokogiri (>= 1.4)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jekyll (3.3.1)
       addressable (~> 2.4)
       colorator (~> 1.0)
@@ -161,7 +163,7 @@ GEM
       rb-fsevent (>= 0.9.3)
       rb-inotify (>= 0.9.7)
     mercenary (0.3.6)
-    mini_portile2 (2.1.0)
+    mini_portile2 (2.3.0)
     minima (2.0.0)
     minitest (5.10.1)
     multipart-post (2.0.0)