diff --git a/rollup.config.js b/rollup.config.mjs
similarity index 92%
rename from rollup.config.js
rename to rollup.config.mjs
index 9b7f12a..43fc6b1 100644
--- a/rollup.config.js
+++ b/rollup.config.mjs
@@ -1,5 +1,5 @@
 import typescript from "rollup-plugin-typescript2";
-import pkg from "./package.json";
+import pkg from "./package.json" assert { type: "json" };
 
 const banner = [
   "/*!",