diff --git a/.prettierrc.json b/.prettierrc.json
new file mode 100644
index 0000000..c6a1376
--- /dev/null
+++ b/.prettierrc.json
@@ -0,0 +1,4 @@
+{
+  "trailingComma": "es5",
+  "singleQuote": true
+}
diff --git a/package.json b/package.json
index 5ac3419..9076396 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
   "types": "lib/index",
   "scripts": {
     "clean": "rimraf lib && rimraf coverage",
-    "format": "prettier --write \"{src,__tests__}/**/*.ts*\" --single-quote --trailing-comma es5",
+    "format": "prettier --write \"{src,__tests__}/**/*.ts*\"",
     "lint": "tslint --force --format verbose \"src/**/*.ts*\"",
     "prepublishOnly": "npm run build",
     "prebuild": "npm run clean && npm run format && npm run lint && echo Using TypeScript && tsc --version",