diff --git a/Gemfile.lock b/Gemfile.lock
index b52eb24..26046b2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,6 +8,7 @@ GEM
       jekyll (~> 3.0)
       nokogiri (>= 1.6.0)
     colorator (1.1.0)
+    concurrent-ruby (1.1.10)
     css_press (0.3.2)
       csspool-st (= 3.1.2)
       json
@@ -35,8 +36,6 @@ GEM
       safe_yaml (~> 1.0)
     jekyll-feed (0.10.0)
       jekyll (~> 3.3)
-    jekyll-multiple-languages-plugin (1.5.1)
-      jekyll (>= 2.0, < 4.0)
     jekyll-sass-converter (1.5.2)
       sass (~> 3.4)
     jekyll-seo-tag (2.5.0)
@@ -82,9 +81,8 @@ GEM
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    thread_safe (0.3.6)
-    tzinfo (1.2.5)
-      thread_safe (~> 0.1)
+    tzinfo (2.0.5)
+      concurrent-ruby (~> 1.0)
     tzinfo-data (1.2018.5)
       tzinfo (>= 1.0.0)
     uglifier (2.7.2)
@@ -99,7 +97,6 @@ DEPENDENCIES
   amp-jekyll
   jekyll (= 3.5.0)
   jekyll-feed (~> 0.6)
-  jekyll-multiple-languages-plugin
   jekyll-seo-tag
   jekyll-sitemap
   octopress-minify-html