diff --git a/Gemfile b/Gemfile
index 7e604be5..32cb3956 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,7 +4,7 @@ gem "amp-jekyll"
 gem "autoprefixer-rails"
 gem "crass"
 gem "font-awesome-sass"
-gem "html-proofer"
+gem "html-proofer", ">= 3.16.0"
 gem "image_optim_bin" # Optional
 gem "image_optim_pack"
 gem "image_optim"
@@ -18,12 +18,12 @@ gem "jekyll-seo-tag"
 gem "jekyll-seo"
 gem "jekyll-sitemap"
 gem "jekyll"
-gem "jemoji"
+gem "jemoji", ">= 0.13.0"
 gem "kramdown-parser-gfm"
 gem "mini_magick"
 gem "rake"
 gem "rouge"
-gem "sanitize"
+gem "sanitize", ">= 5.2.2"
 gem "sass"
 gem "sprockets", "4.0.0.beta8"
 gem "uglifier"
\ No newline at end of file
diff --git a/Gemfile.lock b/Gemfile.lock
index 8193ca12..dbd36054 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,13 +1,13 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (5.2.4.3)
+    activesupport (5.2.8.1)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.7.0)
-      public_suffix (>= 2.0.2, < 5.0)
+    addressable (2.8.6)
+      public_suffix (>= 2.0.2, < 6.0)
     amp-jekyll (1.0.3)
       fastimage (>= 1.8.0)
       jekyll (>= 3.0, < 5.0)
@@ -15,13 +15,13 @@ GEM
     autoprefixer-rails (9.8.6.1)
       execjs
     colorator (1.1.0)
-    concurrent-ruby (1.1.7)
+    concurrent-ruby (1.3.1)
     crass (1.0.6)
-    em-websocket (0.5.1)
+    em-websocket (0.5.3)
       eventmachine (>= 0.12.9)
-      http_parser.rb (~> 0.6.0)
-    ethon (0.12.0)
-      ffi (>= 1.3.0)
+      http_parser.rb (~> 0)
+    ethon (0.16.0)
+      ffi (>= 1.15.0)
     eventmachine (1.2.7)
     execjs (2.7.0)
     exifr (1.3.6)
@@ -30,25 +30,26 @@ GEM
     faraday (1.0.1)
       multipart-post (>= 1.2, < 3)
     fastimage (2.2.0)
-    ffi (1.13.1)
+    ffi (1.16.3)
     font-awesome-sass (5.13.0)
       sassc (>= 1.11)
     forwardable-extended (2.6.0)
     fspath (3.1.2)
-    gemoji (3.0.1)
-    html-pipeline (2.14.0)
+    gemoji (4.1.0)
+    html-pipeline (2.14.3)
       activesupport (>= 2)
       nokogiri (>= 1.4)
-    html-proofer (3.15.3)
+    html-proofer (4.4.3)
       addressable (~> 2.3)
       mercenary (~> 0.3)
-      nokogumbo (~> 2.0)
-      parallel (~> 1.3)
+      nokogiri (~> 1.13)
+      parallel (~> 1.10)
       rainbow (~> 3.0)
       typhoeus (~> 1.3)
       yell (~> 2.0)
-    http_parser.rb (0.6.0)
-    i18n (0.9.5)
+      zeitwerk (~> 2.5)
+    http_parser.rb (0.8.0)
+    i18n (1.14.5)
       concurrent-ruby (~> 1.0)
     image_optim (0.26.5)
       exifr (~> 1.2, >= 1.2.2)
@@ -62,11 +63,11 @@ GEM
       image_optim (~> 0.19)
     image_size (2.1.0)
     in_threads (1.5.4)
-    jekyll (3.9.0)
+    jekyll (3.9.5)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
-      i18n (~> 0.7)
+      i18n (>= 0.7, < 2)
       jekyll-sass-converter (~> 1.0)
       jekyll-watch (~> 2.0)
       kramdown (>= 1.17, < 3)
@@ -109,52 +110,52 @@ GEM
       jekyll (>= 3.7, < 5.0)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
-    jemoji (0.12.0)
-      gemoji (~> 3.0)
+    jemoji (0.13.0)
+      gemoji (>= 3, < 5)
       html-pipeline (~> 2.2)
       jekyll (>= 3.0, < 5.0)
-    kramdown (2.3.0)
+    kramdown (2.4.0)
       rexml
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
-    liquid (4.0.3)
+    liquid (4.0.4)
     liquid-tag-parser (1.9.0)
       extras (~> 0.3)
       liquid (>= 3.0, < 5.0)
-    listen (3.2.1)
+    listen (3.9.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
     mini_magick (4.10.1)
-    mini_portile2 (2.4.0)
-    minitest (5.14.1)
+    mini_portile2 (2.8.6)
+    minitest (5.23.1)
     multipart-post (2.1.1)
-    nokogiri (1.10.10)
-      mini_portile2 (~> 2.4.0)
-    nokogumbo (2.0.2)
-      nokogiri (~> 1.8, >= 1.8.4)
+    nokogiri (1.15.6)
+      mini_portile2 (~> 2.8.2)
+      racc (~> 1.4)
     octokit (4.18.0)
       faraday (>= 0.9)
       sawyer (~> 0.8.0, >= 0.5.3)
-    parallel (1.19.2)
+    parallel (1.24.0)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     posix-spawn (0.3.15)
     progress (3.5.2)
-    public_suffix (4.0.5)
+    public_suffix (5.0.5)
+    racc (1.8.0)
     rack (2.2.3)
-    rainbow (3.0.0)
+    rainbow (3.1.1)
     rake (13.0.1)
-    rb-fsevent (0.10.4)
-    rb-inotify (0.10.1)
+    rb-fsevent (0.11.2)
+    rb-inotify (0.11.1)
       ffi (~> 1.0)
-    rexml (3.2.4)
-    rouge (3.22.0)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
+    rouge (3.30.0)
     safe_yaml (1.0.5)
-    sanitize (5.2.1)
+    sanitize (6.1.0)
       crass (~> 1.0.2)
-      nokogiri (>= 1.8.0)
-      nokogumbo (~> 2.0)
+      nokogiri (>= 1.12.0)
     sass (3.7.4)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
@@ -168,14 +169,16 @@ GEM
     sprockets (4.0.0.beta8)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
+    strscan (3.1.0)
     thread_safe (0.3.6)
-    typhoeus (1.4.0)
+    typhoeus (1.4.1)
       ethon (>= 0.9.0)
-    tzinfo (1.2.7)
+    tzinfo (1.2.11)
       thread_safe (~> 0.1)
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
     yell (2.2.2)
+    zeitwerk (2.6.15)
 
 PLATFORMS
   ruby
@@ -185,7 +188,7 @@ DEPENDENCIES
   autoprefixer-rails
   crass
   font-awesome-sass
-  html-proofer
+  html-proofer (>= 3.16.0)
   image_optim
   image_optim_bin
   image_optim_pack
@@ -199,12 +202,12 @@ DEPENDENCIES
   jekyll-seo
   jekyll-seo-tag
   jekyll-sitemap
-  jemoji
+  jemoji (>= 0.13.0)
   kramdown-parser-gfm
   mini_magick
   rake
   rouge
-  sanitize
+  sanitize (>= 5.2.2)
   sass
   sprockets (= 4.0.0.beta8)
   uglifier