diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
new file mode 100644
index 0000000..54fd5d3
--- /dev/null
+++ b/.github/workflows/continuous-integration.yml
@@ -0,0 +1,53 @@
+name: Continuous Integration
+on:
+  # branches pushed by collaborators
+  push:
+    branches:
+      - master
+  # pull request from non-collaborators
+  pull_request: {}
+  # nightly
+  schedule:
+    - cron:  '0 0 * * *'
+jobs:
+  build:
+    name: "Test: ${{ matrix.os }}, node ${{ matrix.node }}"
+    runs-on: ${{ matrix.os }}-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu, windows]
+        node:
+          - 16
+          - 14
+          - 12
+          - 10
+          - 9
+          - '8'
+          - '7'
+          - '6'
+          - '4'
+          - '0.12'
+          # - '0.10'
+    steps:
+      # checkout code
+      - uses: actions/checkout@v2
+      # install node
+      - name: Use Node.js ${{ matrix.os }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node }}
+
+      # npm install with caching
+      - run: |
+          npm config set cache "$( node -p "process.cwd()" )/temp/npm-cache"
+      - name: Cache dependencies
+        uses: actions/cache@v2
+        with:
+          path: temp/npm-cache
+          key: npm-cache-${{ matrix.os }} ${{ matrix.node }}-${{ hashFiles('package-lock.json') }}
+          # restore-keys: npm-cache-${{ matrix.os }} ${{ matrix.node }}-
+      - run: npm install
+
+      # Run tests
+      - run: npm test
diff --git a/package-lock.json b/package-lock.json
index bbaceca..2bbbd23 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1025,12 +1025,6 @@
       "integrity": "sha1-gVHTWOIMisx/t0XnRywAJf5JZXA=",
       "dev": true
     },
-    "eventemitter3": {
-      "version": "3.1.0",
-      "resolved": "https://registry.npmjs.org/eventemitter3/-/eventemitter3-3.1.0.tgz",
-      "integrity": "sha512-ivIvhpq/Y0uSjcHDcOIccjmYjGLcP09MFGE7ysAwkAvkXfpZlC985pH2/ui64DKazbTW/4kN3yqozUxlXzI6cA==",
-      "dev": true
-    },
     "events": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/events/-/events-1.0.2.tgz",
@@ -1821,14 +1815,22 @@
       }
     },
     "http-proxy": {
-      "version": "1.17.0",
-      "resolved": "https://registry.npmjs.org/http-proxy/-/http-proxy-1.17.0.tgz",
-      "integrity": "sha512-Taqn+3nNvYRfJ3bGvKfBSRwy1v6eePlm3oc/aWVxZp57DQr5Eq3xhKJi7Z4hZpS8PC3H4qI+Yly5EmFacGuA/g==",
+      "version": "1.18.1",
+      "resolved": "https://registry.npmjs.org/http-proxy/-/http-proxy-1.18.1.tgz",
+      "integrity": "sha512-7mz/721AbnJwIVbnaSv1Cz3Am0ZLT/UBwkC92VlxhXv/k/BBQfM2fXElQNC27BVGr0uwUpplYPQM9LnaBMR5NQ==",
       "dev": true,
       "requires": {
-        "eventemitter3": "^3.0.0",
+        "eventemitter3": "^4.0.0",
         "follow-redirects": "^1.0.0",
         "requires-port": "^1.0.0"
+      },
+      "dependencies": {
+        "eventemitter3": {
+          "version": "4.0.7",
+          "resolved": "https://registry.npmjs.org/eventemitter3/-/eventemitter3-4.0.7.tgz",
+          "integrity": "sha512-8guHBZCwKnFhYdHr2ysuRWErTwhoN2X8XELRlrRwpmfeY2jjuUN4taQMsULKUVo1K4DvZl+0pgfyoysHxvmvEw==",
+          "dev": true
+        }
       }
     },
     "http-server": {
diff --git a/test.js b/test.js
index ef7ad55..8fb0a62 100644
--- a/test.js
+++ b/test.js
@@ -86,7 +86,7 @@ function createMultiLineSourceMapWithSourcesContent() {
 
 function compareStackTrace(sourceMap, source, expected) {
   // Check once with a separate source map
-  fs.writeFileSync('.generated.js.map', sourceMap);
+  fs.writeFileSync('.generated.js.map', sourceMap.toString());
   fs.writeFileSync('.generated.js', 'exports.test = function() {' +
     source.join('\n') + '};//@ sourceMappingURL=.generated.js.map');
   try {
@@ -113,7 +113,7 @@ function compareStackTrace(sourceMap, source, expected) {
 
 function compareStdout(done, sourceMap, source, expected) {
   fs.writeFileSync('.original.js', 'this is the original code');
-  fs.writeFileSync('.generated.js.map', sourceMap);
+  fs.writeFileSync('.generated.js.map', sourceMap.toString());
   fs.writeFileSync('.generated.js', source.join('\n') +
     '//@ sourceMappingURL=.generated.js.map');
   child_process.exec('node ./.generated', function(error, stdout, stderr) {
@@ -616,7 +616,7 @@ it('handleUncaughtExceptions is true with existing listener', function(done) {
   ];
 
   fs.writeFileSync('.original.js', 'this is the original code');
-  fs.writeFileSync('.generated.js.map', createSingleLineSourceMap());
+  fs.writeFileSync('.generated.js.map', createSingleLineSourceMap().toString());
   fs.writeFileSync('.generated.js', source.join('\n'));
 
   child_process.exec('node ./.generated', function(error, stdout, stderr) {