diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..6f1e2ab
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,24 @@
+version: 2
+updates:
+  - package-ecosystem: bundler
+    directory: "/"
+    schedule:
+      interval: weekly
+    open-pull-requests-limit: 10
+    groups:
+      security:
+        applies-to: security-updates
+        patterns: ["*"]
+      minor-and-patch:
+        applies-to: version-updates
+        patterns: ["*"]
+        update-types: ["minor", "patch"]
+  - package-ecosystem: github-actions
+    directory: "/"
+    schedule:
+      interval: weekly
+    open-pull-requests-limit: 10
+    groups:
+      github-actions:
+        patterns: ["*"]
+        update-types: ["minor", "patch"]
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..36cf184
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,17 @@
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches: [ main ]
+
+jobs:
+  rspec:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: .ruby-version
+          bundler-cache: true
+      - run: bundle exec rspec
diff --git a/.github/workflows/dependabot-auto-merge.yml b/.github/workflows/dependabot-auto-merge.yml
new file mode 100644
index 0000000..24b34ef
--- /dev/null
+++ b/.github/workflows/dependabot-auto-merge.yml
@@ -0,0 +1,27 @@
+name: Dependabot auto-merge
+
+on: pull_request
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  auto-merge:
+    if: github.event.pull_request.user.login == 'dependabot[bot]'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Fetch Dependabot metadata
+        id: metadata
+        uses: dependabot/fetch-metadata@v2
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+
+      # Patch/minor bumps and any PR that fixes a security advisory are
+      # queued for auto-merge; they still wait for the required CI checks.
+      - name: Enable auto-merge
+        if: steps.metadata.outputs.update-type != 'version-update:semver-major' || steps.metadata.outputs.ghsa-id != ''
+        run: gh pr merge --auto --merge "$PR_URL"
+        env:
+          PR_URL: ${{ github.event.pull_request.html_url }}
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.ruby-version b/.ruby-version
new file mode 100644
index 0000000..25e8632
--- /dev/null
+++ b/.ruby-version
@@ -0,0 +1 @@
+3.4.12
diff --git a/mise.toml b/mise.toml
index 63adf13..c71cdd4 100644
--- a/mise.toml
+++ b/mise.toml
@@ -1,2 +1,2 @@
 [tools]
-ruby = "3.4.2"
+ruby = "3.4.12"