diff --git a/templates/rescript-template-basic/README.md b/templates/rescript-template-basic/README.md
index b18cb38..0ab1dc7 100644
--- a/templates/rescript-template-basic/README.md
+++ b/templates/rescript-template-basic/README.md
@@ -19,5 +19,5 @@ npm install
 ## Run
 
 ```sh
-node src/Demo.res.js
+node src/Demo.res.mjs
 ```
diff --git a/templates/rescript-template-basic/rescript.json b/templates/rescript-template-basic/rescript.json
index d1698e7..347a381 100644
--- a/templates/rescript-template-basic/rescript.json
+++ b/templates/rescript-template-basic/rescript.json
@@ -5,10 +5,10 @@
     "subdirs": true
   },
   "package-specs": {
-    "module": "commonjs",
+    "module": "esmodule",
     "in-source": true
   },
-  "suffix": ".res.js",
+  "suffix": ".res.mjs",
   "bs-dependencies": ["@rescript/core"],
   "bsc-flags": ["-open RescriptCore"]
 }