diff --git a/build.ts b/build.ts
index a5c062b..78ed172 100644
--- a/build.ts
+++ b/build.ts
@@ -91,7 +91,7 @@ if (!isDev) {
 
 console.log(chalk.cyan('Copying other files...\n'));
 copyFiles.forEach((file) => {
-	const outputPath = file.replace(new RegExp(`^${srcDir}`), publicDir);
+	const outputPath = file.replace(new RegExp(`^${srcDir}`), publicDir).replace(/\.js$/, '.js');
 	mkdirSync(dirname(outputPath), { recursive: true });
 	writeFileSync(outputPath, readFileSync(file));
 });