diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
new file mode 100644
index 0000000..87b2565
--- /dev/null
+++ b/.github/workflows/main.yml
@@ -0,0 +1,17 @@
+name: HTMLProofer
+on: [push, pull_request]
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ruby-version: ['2.7', '3.0']
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby-version }}
+          bundler-cache: true
+      - name: Run tests
+        run: bundle exec rake
\ No newline at end of file
diff --git a/Gemfile b/Gemfile
index 6d5ab76..f59b1ba 100644
--- a/Gemfile
+++ b/Gemfile
@@ -28,3 +28,5 @@ end
 # Performance-booster for watching directories on Windows
 gem "wdm", "~> 0.1.1", :platforms => [:mingw, :x64_mingw, :mswin]
 
+
+gem "html-proofer", "~> 3.18"
diff --git a/Gemfile.lock b/Gemfile.lock
index cc557b0..8928c3c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,9 +8,19 @@ GEM
     em-websocket (0.5.2)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
+    ethon (0.12.0)
+      ffi (>= 1.3.0)
     eventmachine (1.2.7)
     ffi (1.14.2)
     forwardable-extended (2.6.0)
+    html-proofer (3.18.8)
+      addressable (~> 2.3)
+      mercenary (~> 0.3)
+      nokogumbo (~> 2.0)
+      parallel (~> 1.3)
+      rainbow (~> 3.0)
+      typhoeus (~> 1.3)
+      yell (~> 2.0)
     http_parser.rb (0.6.0)
     i18n (1.8.9)
       concurrent-ruby (~> 1.0)
@@ -50,9 +60,18 @@ GEM
       jekyll (>= 3.5, < 5.0)
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
+    nokogiri (1.11.1-x86_64-darwin)
+      racc (~> 1.4)
+    nokogiri (1.11.1-x86_64-linux)
+      racc (~> 1.4)
+    nokogumbo (2.0.4)
+      nokogiri (~> 1.8, >= 1.8.4)
+    parallel (1.20.1)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (4.0.6)
+    racc (1.5.2)
+    rainbow (3.0.0)
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
@@ -63,12 +82,17 @@ GEM
       ffi (~> 1.9)
     terminal-table (2.0.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
+    typhoeus (1.4.0)
+      ethon (>= 0.9.0)
     unicode-display_width (1.7.0)
+    yell (2.2.2)
 
 PLATFORMS
+  x86_64-darwin-19
   x86_64-linux
 
 DEPENDENCIES
+  html-proofer (~> 3.18)
   jekyll (~> 4.2.0)
   jekyll-feed (~> 0.12)
   minima (~> 2.5)
diff --git a/Rakefile b/Rakefile
new file mode 100644
index 0000000..9bbfb78
--- /dev/null
+++ b/Rakefile
@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+require 'html-proofer'
+
+task default: :check
+
+desc 'Clean out _site'
+task :clean do
+  sh 'rm -rf _site'
+end
+
+desc 'Preview site'
+task watch: :clean do
+  sh 'jekyll serve --watch'
+end
+
+desc 'Build site'
+task build: :clean do
+  sh 'jekyll build'
+end
+
+desc 'Run HTMLProofer on _site'
+task check: :build do
+  options = {
+    check_html: true,
+    allow_hash_href: true,
+    assume_extension: true,
+    typhoeus: {
+      headers: { "User-Agent": 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:86.0) Gecko/20100101 Firefox/86.0' }
+    }
+  }
+  HTMLProofer.check_directory('./_site', options).run
+end