diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..c674acb
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,15 @@
+name: CI
+
+on: push
+
+jobs:
+  ci:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - run: rm Gemfile.lock
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: 3.0.3
+          bundler-cache: true
+      - run: bundle exec rake ci
diff --git a/Gemfile b/Gemfile
index 239879a..4bf9331 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,3 +5,4 @@ gemspec
 gem "sprockets", "< 4"
 gem "sprockets-rails"
 gem "puma"
+gem "webrick"
diff --git a/Gemfile.lock b/Gemfile.lock
index f2209a8..30a8476 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -209,6 +209,7 @@ GEM
     timeout (0.4.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
+    webrick (1.8.1)
     websocket (1.2.9)
     websocket-driver (0.7.6)
       websocket-extensions (>= 0.1.0)
@@ -238,6 +239,7 @@ DEPENDENCIES
   teaspoon-mocha
   thin
   turbograft!
+  webrick
 
 BUNDLED WITH
    2.4.8