diff --git a/packages/proto-loader/package.json b/packages/proto-loader/package.json
index 53b269d1..97e00691 100644
--- a/packages/proto-loader/package.json
+++ b/packages/proto-loader/package.json
@@ -38,8 +38,8 @@
   "files": [
     "LICENSE",
     "build/src/*.d.ts",
-    "build/src/*.js",
-    "build/bin/*.js"
+    "build/src/*.{js,js.map}",
+    "build/bin/*.{js,js.map}"
   ],
   "bin": {
     "proto-loader-gen-types": "./build/bin/proto-loader-gen-types.js"