diff --git a/packages/multiply/package.json b/packages/multiply/package.json
index 09b602f..7bddf9f 100644
--- a/packages/multiply/package.json
+++ b/packages/multiply/package.json
@@ -4,7 +4,7 @@
   "version": "1.0.0",
   "description": "",
   "type": "module",
-  "module": "./src",
+  "module": "./src/index.mjs",
   "main": "./dist/index.cjs",
   "types": "./dist/cjs/index.d.js",
   "exports": {
diff --git a/packages/sum/package.json b/packages/sum/package.json
index d465bfb..f1d2622 100644
--- a/packages/sum/package.json
+++ b/packages/sum/package.json
@@ -4,7 +4,7 @@
   "version": "1.0.0",
   "description": "",
   "type": "module",
-  "module": "./src",
+  "module": "./src/index.mjs",
   "main": "./dist/index.cjs",
   "types": "./dist/types/index.d.js",
   "exports": {