diff --git a/Gemfile b/Gemfile
index ba9baea..4981fe6 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,12 +8,12 @@ gem 'jekyll-seo-tag'
 gem 'jekyll-sitemap'
 gem 'bootstrap-sass'
 gem 'font-awesome-sass'
-gem 'html-proofer'
+gem 'html-proofer', '>= 3.4.0'
 gem 'sass'
 gem 'uglifier'
 
 group :jekyll_plugins do
-    gem 'algoliasearch-jekyll'
+    gem 'algoliasearch-jekyll', '>= 0.8.0'
 end
 source 'https://rails-assets.org' do
   gem 'rails-assets-jquery'
diff --git a/Gemfile.lock b/Gemfile.lock
index 88c7358..be9f30f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,21 +2,16 @@ GEM
   remote: https://rubygems.org/
   remote: https://rails-assets.org/
   specs:
-    activesupport (5.0.1)
-      concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (~> 0.7)
-      minitest (~> 5.1)
-      tzinfo (~> 1.1)
     addressable (2.4.0)
-    algoliasearch (1.10.0)
-      httpclient (~> 2.7.1)
+    algoliasearch (1.27.5)
+      httpclient (~> 2.8, >= 2.8.3)
       json (>= 1.5.1)
-    algoliasearch-jekyll (0.8.0)
-      algoliasearch (~> 1.4)
+    algoliasearch-jekyll (0.9.1)
+      algoliasearch (~> 1.12)
       appraisal (~> 2.1.0)
       awesome_print (~> 1.6)
-      json (~> 1.8)
-      nokogiri (~> 1.6)
+      json (>= 1.8.6)
+      nokogiri (~> 1.7, >= 1.7.2)
       verbal_expressions (~> 0.1.5)
     appraisal (2.1.0)
       bundler
@@ -25,35 +20,32 @@ GEM
     autoprefixer-rails (6.3.3)
       execjs
       json
-    awesome_print (1.7.0)
+    awesome_print (1.9.2)
     bootstrap-sass (3.3.6)
       autoprefixer-rails (>= 5.2.1)
       sass (>= 3.3.4)
     colorator (0.1)
-    colored (1.2)
-    concurrent-ruby (1.0.2)
-    ethon (0.10.1)
-      ffi (>= 1.3.0)
+    concurrent-ruby (1.1.9)
+    ethon (0.14.0)
+      ffi (>= 1.15.0)
     execjs (2.6.0)
     extras (0.1.0)
       forwardable-extended (~> 2.5)
     fastimage (2.0.0)
       addressable (~> 2)
-    ffi (1.9.10)
+    ffi (1.15.4)
     font-awesome-sass (4.6.2)
       sass (>= 3.2)
     forwardable-extended (2.6.0)
-    html-proofer (3.4.0)
-      activesupport (>= 4.2, < 6.0)
+    html-proofer (3.19.2)
       addressable (~> 2.3)
-      colored (~> 1.2)
-      mercenary (~> 0.3.2)
-      nokogiri (~> 1.5)
+      mercenary (~> 0.3)
+      nokogumbo (~> 2.0)
       parallel (~> 1.3)
-      typhoeus (~> 0.7)
+      rainbow (~> 3.0)
+      typhoeus (~> 1.3)
       yell (~> 2.0)
-    httpclient (2.7.2)
-    i18n (0.7.0)
+    httpclient (2.8.3)
     jekyll (3.1.2)
       colorator (~> 0.1)
       jekyll-sass-converter (~> 1.0)
@@ -80,26 +72,28 @@ GEM
       ruby-nuggets
     jekyll-watch (1.3.1)
       listen (~> 3.0)
-    json (1.8.3)
+    json (2.5.1)
     kramdown (1.10.0)
     liquid (3.0.6)
     listen (3.0.6)
       rb-fsevent (>= 0.9.3)
       rb-inotify (>= 0.9.7)
     mercenary (0.3.6)
-    mini_portile2 (2.1.0)
-    minitest (5.10.1)
-    nokogiri (1.6.8)
-      mini_portile2 (~> 2.1.0)
-      pkg-config (~> 1.1.7)
+    mini_portile2 (2.6.1)
+    nokogiri (1.12.4)
+      mini_portile2 (~> 2.6.1)
+      racc (~> 1.4)
+    nokogumbo (2.0.5)
+      nokogiri (~> 1.8, >= 1.8.4)
     nuggets (1.0.0)
-    parallel (1.10.0)
+    parallel (1.20.1)
     pathutil (0.9.0)
       forwardable-extended (~> 2.6)
-    pkg-config (1.1.7)
+    racc (1.5.2)
     rack (1.6.4)
     rails-assets-jquery (2.2.3)
-    rake (11.2.2)
+    rainbow (3.0.0)
+    rake (13.0.6)
     rb-fsevent (0.9.7)
     rb-inotify (0.9.7)
       ffi (>= 0.5.0)
@@ -111,25 +105,22 @@ GEM
     sprockets (3.6.0)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
-    thor (0.19.1)
-    thread_safe (0.3.5)
-    typhoeus (0.8.0)
-      ethon (>= 0.8.0)
-    tzinfo (1.2.2)
-      thread_safe (~> 0.1)
+    thor (1.1.0)
+    typhoeus (1.4.0)
+      ethon (>= 0.9.0)
     uglifier (3.1.4)
       execjs (>= 0.3.0, < 3)
     verbal_expressions (0.1.5)
-    yell (2.0.7)
+    yell (2.2.2)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  algoliasearch-jekyll
+  algoliasearch-jekyll (>= 0.8.0)
   bootstrap-sass
   font-awesome-sass
-  html-proofer
+  html-proofer (>= 3.4.0)
   jekyll
   jekyll-assets
   jekyll-paginate
@@ -141,4 +132,4 @@ DEPENDENCIES
   uglifier
 
 BUNDLED WITH
-   1.14.0
+   1.17.3