diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..fea0d51
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,19 @@
+name: CI
+
+on: [push]
+
+permissions:
+  contents: read
+
+jobs:
+
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          bundler-cache: true
+      - run: bundle install --jobs 4 --retry 3 --path vendor/bundle
+      - run: bundle exec jekyll build
diff --git a/.ruby-version b/.ruby-version
new file mode 100644
index 0000000..15a2799
--- /dev/null
+++ b/.ruby-version
@@ -0,0 +1 @@
+3.3.0