diff --git a/Gemfile b/Gemfile
index b126b2f..37a24b7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
-gem 'html-proofer', '>= 3.11.1'
+gem 'html-proofer', '>= 3.15.0'
 gem 'jekyll', '>= 3.6.3'
 gem 'jekyll-assets', '>= 2.4.0'
 gem 'jekyll-avatar', '>= 0.4.0'
@@ -8,10 +8,10 @@ gem 'jekyll-coffeescript'
 gem 'jekyll-feed'
 gem 'jekyll-haml', '>= 0.1.4'
 gem 'jekyll-language-plugin'
-gem 'jekyll-mentions', '>= 1.5.1'
+gem 'jekyll-mentions', '>= 1.6.0'
 gem 'jekyll-scholar', '>= 5.8.2'
 gem 'jekyll-scholar-extras', :github => 'jgoodall/jekyll-scholar-extras'
 gem 'jekyll-seo-tag', '>= 2.0.0'
 gem 'jekyll-sitemap'
-gem 'jemoji', '>= 0.11.1'
-gem 'nokogiri', '>= 1.10.5'
+gem 'jemoji', '>= 0.12.0'
+gem 'nokogiri', '>= 1.16.5'