diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 49ee502e..b4889320 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -34,3 +34,5 @@ jobs:
               run: npm ci
             - name: Type check
               run: npm run check
+            - name: Lint
+              run: npm run lint
diff --git a/package.json b/package.json
index 1ea7e13d..a9b482c2 100644
--- a/package.json
+++ b/package.json
@@ -22,6 +22,8 @@
         "build": "rollup -c",
         "check": "tsc --noEmit",
         "check:watch": "tsc --noEmit --watch",
+        "lint": "prettier --check .",
+        "format": "prettier --write .",
         "test": "ava",
         "prepare": "npm run build",
         "prepublishOnly": "npm test"
diff --git a/src/print/helpers.ts b/src/print/helpers.ts
index 68ee12f8..a33130cf 100644
--- a/src/print/helpers.ts
+++ b/src/print/helpers.ts
@@ -17,7 +17,7 @@ import {
     SlotTemplateNode,
     StyleNode,
     TitleNode,
-    WindowNode
+    WindowNode,
 } from './nodes';
 import { ParserOptions } from '../options';
 
diff --git a/test/formatting/samples/syntax-error/options.json b/test/formatting/samples/syntax-error/options.json
index da3820b0..b3799646 100644
--- a/test/formatting/samples/syntax-error/options.json
+++ b/test/formatting/samples/syntax-error/options.json
@@ -1,3 +1,3 @@
 {
-  "expectSyntaxErrors": true
-}
\ No newline at end of file
+    "expectSyntaxErrors": true
+}
diff --git a/test/printer/samples/allow-shorthand-false.options.json b/test/printer/samples/allow-shorthand-false.options.json
index 1b6ce299..e495e729 100644
--- a/test/printer/samples/allow-shorthand-false.options.json
+++ b/test/printer/samples/allow-shorthand-false.options.json
@@ -1,3 +1,3 @@
 {
-	"svelteAllowShorthand": false
-}
\ No newline at end of file
+    "svelteAllowShorthand": false
+}
diff --git a/test/printer/samples/allow-shorthand-true.options.json b/test/printer/samples/allow-shorthand-true.options.json
index 16724264..29935c66 100644
--- a/test/printer/samples/allow-shorthand-true.options.json
+++ b/test/printer/samples/allow-shorthand-true.options.json
@@ -1,3 +1,3 @@
 {
-	"svelteAllowShorthand": true
-}
\ No newline at end of file
+    "svelteAllowShorthand": true
+}
diff --git a/wallaby.js b/wallaby.js
index 43a34ab1..fe8d5693 100644
--- a/wallaby.js
+++ b/wallaby.js
@@ -1,4 +1,4 @@
-module.exports = function(w) {
+module.exports = function (w) {
     return {
         files: ['src/**/*.ts', 'test/**/*.html'],
         tests: ['test/**/*.ts'],