diff --git a/Gemfile b/Gemfile
index 78a22e4e954..bbbb9db697f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,7 +3,7 @@ source 'https://rubygems.org'
 ruby '2.6.3'
 
 gem 'faraday'
-gem 'html-proofer', '~> 3.0'
+gem 'html-proofer', '~> 3.15', '>= 3.15.3'
 gem 'jekyll', '>=3.1.6'
 gem 'jekyll-paginate'
 gem 'jekyll-redirect-from'
@@ -19,7 +19,7 @@ gem 'rubocop', group: :test
 
 # All of this is for Slate / middleman
 
-gem "middleman", '~> 3.0'
+gem "middleman", "~> 3.4", ">= 3.4.1"
 
 # For syntax highlighting
 gem "middleman-syntax"
diff --git a/Gemfile.lock b/Gemfile.lock
index dd1fce7e55f..aa65390738d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -32,8 +32,8 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.7.0)
-      public_suffix (>= 2.0.2, < 5.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     ast (2.4.1)
     capybara (2.4.4)
       mime-types (>= 1.16)
@@ -41,7 +41,7 @@ GEM
       rack (>= 1.0.0)
       rack-test (>= 0.5.4)
       xpath (~> 2.0)
-    chunky_png (1.3.11)
+    chunky_png (1.4.0)
     cl (1.2.4)
       regstry (~> 1.0.3)
     coderay (1.1.3)
@@ -50,33 +50,34 @@ GEM
       execjs
     coffee-script-source (1.12.2)
     colorator (1.1.0)
-    em-websocket (0.5.1)
+    em-websocket (0.5.3)
       eventmachine (>= 0.12.9)
-      http_parser.rb (~> 0.6.0)
+      http_parser.rb (~> 0)
     erubis (2.7.0)
-    ethon (0.12.0)
-      ffi (>= 1.3.0)
+    ethon (0.15.0)
+      ffi (>= 1.15.0)
     eventmachine (1.2.7)
-    execjs (2.7.0)
+    execjs (2.8.1)
     faraday (1.0.1)
       multipart-post (>= 1.2, < 3)
-    ffi (1.13.1)
+    ffi (1.15.5)
     forwardable-extended (2.6.0)
-    haml (5.1.2)
-      temple (>= 0.8.0)
+    haml (6.0.7)
+      temple (>= 0.8.2)
+      thor
       tilt
     hike (1.2.3)
     hooks (0.4.1)
       uber (~> 0.0.14)
-    html-proofer (3.15.3)
+    html-proofer (3.19.4)
       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)
+    http_parser.rb (0.8.0)
     i18n (0.7.0)
     jekyll (3.8.7)
       addressable (~> 2.4)
@@ -98,7 +99,7 @@ GEM
       sass (~> 3.4)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
-    json (2.3.1)
+    json (2.6.2)
     kramdown (1.17.0)
     libv8 (3.16.14.19)
     liquid (4.0.3)
@@ -132,7 +133,7 @@ GEM
       tilt (~> 1.4.1, < 2.0)
     middleman-gh-pages (0.4.1)
       rake (> 0.9.3)
-    middleman-livereload (3.4.6)
+    middleman-livereload (3.4.7)
       em-websocket (~> 0.5.1)
       middleman-core (>= 3.3)
       rack-livereload (~> 0.3.15)
@@ -141,30 +142,28 @@ GEM
       sprockets (~> 2.12.1)
       sprockets-helpers (~> 1.1.0)
       sprockets-sass (~> 1.3.0)
-    middleman-syntax (3.2.0)
+    middleman-syntax (3.3.0)
       middleman-core (>= 3.2)
       rouge (~> 3.2)
-    mime-types (3.3.1)
+    mime-types (3.4.1)
       mime-types-data (~> 3.2015)
-    mime-types-data (3.2020.0512)
-    mini_portile2 (2.5.1)
-    minitest (5.14.1)
-    multi_json (1.14.1)
+    mime-types-data (3.2022.0105)
+    mini_portile2 (2.8.0)
+    minitest (5.16.3)
+    multi_json (1.15.0)
     multipart-post (2.1.1)
     netrc (0.11.0)
     nio4r (2.5.2)
-    nokogiri (1.11.4)
-      mini_portile2 (~> 2.5.0)
+    nokogiri (1.13.9)
+      mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
-    nokogumbo (2.0.2)
-      nokogiri (~> 1.8, >= 1.8.4)
     padrino-helpers (0.12.9)
       i18n (~> 0.6, >= 0.6.7)
       padrino-support (= 0.12.9)
       tilt (>= 1.4.1, < 3)
     padrino-support (0.12.9)
       activesupport (>= 3.1)
-    parallel (1.19.2)
+    parallel (1.22.1)
     parser (2.7.1.4)
       ast (~> 2.4.1)
     pathutil (0.16.2)
@@ -172,10 +171,10 @@ GEM
     pry (0.13.1)
       coderay (~> 1.1)
       method_source (~> 1.0)
-    public_suffix (4.0.5)
+    public_suffix (5.0.0)
     puma (4.3.5)
       nio4r (~> 2.0)
-    racc (1.5.2)
+    racc (1.6.0)
     rack (1.6.13)
     rack-jekyll (0.5.0)
       jekyll (>= 1.3)
@@ -184,11 +183,11 @@ GEM
     rack-livereload (0.3.17)
       rack
     rack-ssl-enforcer (0.2.9)
-    rack-test (1.1.0)
-      rack (>= 1.0, < 3)
-    rainbow (3.0.0)
+    rack-test (2.0.2)
+      rack (>= 1.3)
+    rainbow (3.1.1)
     rake (13.0.1)
-    rb-fsevent (0.10.4)
+    rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     rdiscount (2.2.0.1)
@@ -197,7 +196,7 @@ GEM
     regexp_parser (1.7.1)
     regstry (1.0.15)
     rexml (3.2.5)
-    rouge (3.20.0)
+    rouge (3.30.0)
     rubocop (0.86.0)
       parallel (~> 1.10)
       parser (>= 2.7.0.1)
@@ -227,12 +226,12 @@ GEM
     therubyracer (0.12.3)
       libv8 (~> 3.16.14.15)
       ref
-    thor (1.0.1)
+    thor (1.2.1)
     thread_safe (0.3.6)
     tilt (1.4.1)
     typhoeus (1.4.0)
       ethon (>= 0.9.0)
-    tzinfo (1.2.7)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     uber (0.0.15)
     uglifier (2.7.2)
@@ -251,11 +250,11 @@ DEPENDENCIES
   compass-core!
   dpl!
   faraday
-  html-proofer (~> 3.0)
+  html-proofer (~> 3.15, >= 3.15.3)
   jekyll (>= 3.1.6)
   jekyll-paginate
   jekyll-redirect-from
-  middleman (~> 3.0)
+  middleman (~> 3.4, >= 3.4.1)
   middleman-gh-pages
   middleman-livereload
   middleman-syntax