diff --git a/.prettierrc b/.prettierrc
index 362e010..544138b 100644
--- a/.prettierrc
+++ b/.prettierrc
@@ -1,3 +1,3 @@
 {
-   "singleQuote": true
+  "singleQuote": true
 }
diff --git a/package.json b/package.json
index 4b7512b..60b5238 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,8 @@
   "sideEffects": false,
   "scripts": {
     "build": "tsup --dts",
-    "lint": "tsc"
+    "lint": "tsc",
+    "format": "prettier --write ./src"
   },
   "repository": {
     "type": "git",
diff --git a/src/createElement.ts b/src/createElement.ts
index 5b5c6f9..1a79107 100644
--- a/src/createElement.ts
+++ b/src/createElement.ts
@@ -23,7 +23,7 @@
 export default function createElement<K extends keyof HTMLElementTagNameMap>(
   tagName: K,
   options: CreateElementOptions = {},
-  target = document
+  target = document,
 ): HTMLElementTagNameMap[K] {
   const element = target.createElement(tagName);
   Object.entries(options).forEach(([key, value]) => {
@@ -40,7 +40,7 @@ export default function createElement<K extends keyof HTMLElementTagNameMap>(
       Object.entries(value as Record<string, string>).forEach(
         ([dataKey, dataValue]) => {
           element.dataset[dataKey] = dataValue;
-        }
+        },
       );
       return;
     }
diff --git a/src/qs.ts b/src/qs.ts
index 8d2c216..c504639 100644
--- a/src/qs.ts
+++ b/src/qs.ts
@@ -11,7 +11,7 @@
  */
 export default function qs<E extends Element>(
   selector: string,
-  parent: ParentNode = document
+  parent: ParentNode = document,
 ) {
   return parent.querySelector<E>(selector);
 }
diff --git a/src/qsa.ts b/src/qsa.ts
index af58d7b..997c9cb 100644
--- a/src/qsa.ts
+++ b/src/qsa.ts
@@ -14,7 +14,7 @@
  */
 export default function qsa<E extends Element>(
   selector: string,
-  parent: ParentNode = document
+  parent: ParentNode = document,
 ): NodeListOf<E> {
   return parent.querySelectorAll<E>(selector);
 }