diff --git a/package.json b/package.json
index f6837da92..a2d9f92ef 100644
--- a/package.json
+++ b/package.json
@@ -1,5 +1,6 @@
 {
   "name": "screeps-typescript-starter",
+  "type": "module",
   "version": "3.0.0",
   "description": "",
   "main": "index.js",
diff --git a/rollup.config.js b/rollup.config.js
index 70da24d20..b93b61a62 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -10,8 +10,12 @@ let cfg;
 const dest = process.env.DEST;
 if (!dest) {
   console.log("No destination specified - code will be compiled but not uploaded");
-} else if ((cfg = require("./screeps.json")[dest]) == null) {
-  throw new Error("Invalid upload destination");
+} else {
+  const screepsData = await import( "./screeps.json", { with: { type: "json" } } );
+  cfg = screepsData.default[dest];
+  if (cfg == null) {
+    throw new Error("Invalid upload destination");
+  }
 }
 
 export default {