diff --git a/.licenseignore b/.licenseignore
index cea0a0e..5f8d927 100644
--- a/.licenseignore
+++ b/.licenseignore
@@ -9,8 +9,10 @@
 **/*.pug
 
 package.json
-package-lock.json
+yarn.lock
 \.editorconfig
 \.gitignore
 \.licenseignore
+\.prettierignore
+\.prettierrc.yaml
 Dockerfile
\ No newline at end of file
diff --git a/.prettierignore b/.prettierignore
new file mode 100644
index 0000000..60ae4e0
--- /dev/null
+++ b/.prettierignore
@@ -0,0 +1,4 @@
+.git
+node_modules
+LICENSE
+LICENSE.HEADER
\ No newline at end of file
diff --git a/.prettierrc.yaml b/.prettierrc.yaml
new file mode 100644
index 0000000..6b9c164
--- /dev/null
+++ b/.prettierrc.yaml
@@ -0,0 +1,4 @@
+trailingComma: 'es5'
+tabWidth: 2
+semi: false
+singleQuote: true
diff --git a/package.json b/package.json
index ea63c06..9434290 100644
--- a/package.json
+++ b/package.json
@@ -7,6 +7,7 @@
     "bent": "^7.3.12",
     "browserify": "^17.0.0",
     "merge-options": "^3.0.3",
+    "prettier": "^2.1.2",
     "valid-url": "^1.0.9"
   },
   "devDependencies": {
@@ -20,6 +21,8 @@
   "scripts": {
     "release:bundle": "./node_modules/browserify/bin/cmd.js ./src/index.js --standalone doip -o ./dist/doip.js",
     "release:minify": "./node_modules/minify/bin/minify.js ./dist/doip.js > ./dist/doip.min.js",
+    "prettier:check": "./node_modules/prettier/bin-prettier.js --check .",
+    "prettier:write": "./node_modules/prettier/bin-prettier.js --write .",
     "license:check": "./node_modules/license-check-and-add/dist/src/cli.js check",
     "license:add": "./node_modules/license-check-and-add/dist/src/cli.js add",
     "license:remove": "./node_modules/license-check-and-add/dist/src/cli.js remove",
diff --git a/yarn.lock b/yarn.lock
index 5cce8ac..bd8b9b0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1621,6 +1621,11 @@ picomatch@^2.0.4, picomatch@^2.0.5, picomatch@^2.2.1:
   resolved "https://registry.yarnpkg.com/picomatch/-/picomatch-2.2.2.tgz#21f333e9b6b8eaff02468f5146ea406d345f4dad"
   integrity sha512-q0M/9eZHzmr0AulXyPwNfZjtwZ/RBZlbN3K3CErVrk50T2ASYI7Bye0EvekFY3IP1Nt2DHu0re+V2ZHIpMkuWg==
 
+prettier@^2.1.2:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.1.2.tgz#3050700dae2e4c8b67c4c3f666cdb8af405e1ce5"
+  integrity sha512-16c7K+x4qVlJg9rEbXl7HEGmQyZlG4R9AgP+oHKRMsMsuk8s+ATStlf1NpDqyBI1HpVyfjLOeMhH2LvuNvV5Vg==
+
 process-nextick-args@~2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/process-nextick-args/-/process-nextick-args-2.0.1.tgz#7820d9b16120cc55ca9ae7792680ae7dba6d7fe2"