diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
new file mode 100644
index 0000000..ce17664
--- /dev/null
+++ b/.github/workflows/docs.yml
@@ -0,0 +1,35 @@
+name: Build documentation
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: "ubuntu-latest"
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: "3.2"
+          bundler-cache: true
+      - run: bundle exec yardoc
+      - uses: actions/upload-pages-artifact@v2
+        with:
+          path: "doc/"
+
+  deploy:
+    needs: build
+    permissions:
+      pages: write
+      id-token: write
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v2
diff --git a/re2.gemspec b/re2.gemspec
index 1a7475d..23087d5 100644
--- a/re2.gemspec
+++ b/re2.gemspec
@@ -40,5 +40,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency("rake-compiler", "~> 1.2.1")
   s.add_development_dependency("rake-compiler-dock", "~> 1.3.0")
   s.add_development_dependency("rspec", "~> 3.2")
+  s.add_development_dependency("yard")
+  s.add_development_dependency("redcarpet")
   s.add_runtime_dependency("mini_portile2", "~> 2.8.5") # keep version in sync with extconf.rb
 end