diff --git a/.circleci/Dockerfile b/.circleci/Dockerfile
deleted file mode 100644
index f7d6591..0000000
--- a/.circleci/Dockerfile
+++ /dev/null
@@ -1,6 +0,0 @@
-FROM mhart/alpine-node:11.3.0
-WORKDIR /src
-COPY package.json ./
-RUN npm i
-COPY index.js test.js ./
-RUN npm run test
diff --git a/.circleci/config.yml b/.circleci/config.yml
deleted file mode 100644
index 78a078f..0000000
--- a/.circleci/config.yml
+++ /dev/null
@@ -1,7 +0,0 @@
-version: 2
-jobs:
-  build:
-    machine: true
-    steps:
-      - checkout
-      - run: docker build -f .circleci/Dockerfile .
diff --git a/.dockerignore b/.dockerignore
deleted file mode 100644
index 8a43dfc..0000000
--- a/.dockerignore
+++ /dev/null
@@ -1,2 +0,0 @@
-/.git/
-/node_modules/
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..7170cff
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,21 @@
+name: CI
+on:
+  - push
+  - pull_request
+jobs:
+  test:
+    name: Node.js ${{ matrix.node-version }}
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version:
+          - 16
+          - 14
+          - 12
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: npm install
+      - run: npm test