diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
new file mode 100644
index 0000000..cc812ea
--- /dev/null
+++ b/.github/workflows/lint.yml
@@ -0,0 +1,36 @@
+name: Lint
+
+# Run only one workflow at a time on a pr
+# https://docs.github.com/en/actions/using-jobs/using-concurrency#example-using-a-fallback-value
+concurrency:
+  group: ${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+on:
+  pull_request:
+    branches: [ main ]
+    paths:
+      - 'bin/**'
+      - 'lib/**'
+      - 'tests/**.dart'
+  workflow_dispatch:
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: '0'
+
+      - uses: dart-lang/setup-dart@v1.3
+        with:
+          sdk: stable
+
+      - name: Install dependencies
+        run: dart pub get
+
+      - name: Run linter
+        run: dart analyze --fatal-infos
diff --git a/bin/alfa.dart b/bin/alfa.dart
index 3b2611c..d0d4152 100644
--- a/bin/alfa.dart
+++ b/bin/alfa.dart
@@ -213,7 +213,7 @@ void main(List<String> args) async {
 
     // executes shell command
     var streams = await Process.start(executable, arguments, runInShell: true)
-        .then((Process process) {
+        .then((process) {
       var outStream = stdout.addStream(process.stdout);
       var errStream = stderr.addStream(process.stderr);
 
diff --git a/lib/src/schema.dart b/lib/src/schema.dart
index 3c7f618..94cfdde 100644
--- a/lib/src/schema.dart
+++ b/lib/src/schema.dart
@@ -1,23 +1,23 @@
 final configSchema = {
-  "type": "object",
-  "patternProperties": {
-    ".*": {
-      "type": "object",
-      "properties": {
-        "tags": {
-          "type": "array",
-          "items": {"type": "string"}
+  'type': 'object',
+  'patternProperties': {
+    '.*': {
+      'type': 'object',
+      'properties': {
+        'tags': {
+          'type': 'array',
+          'items': {'type': 'string'}
         },
-        "os": {
-          "type": "array",
-          "items": {
-            "type": "string",
-            "enum": ["macos", "linux"]
+        'os': {
+          'type': 'array',
+          'items': {
+            'type': 'string',
+            'enum': ['macos', 'linux']
           }
         },
-        "options": {
-          "type": "array",
-          "items": {"type": "string"}
+        'options': {
+          'type': 'array',
+          'items': {'type': 'string'}
         }
       }
     }