diff --git a/package.json b/package.json
index 0f32dcc..57b2578 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,7 @@
         "dist/error.umd.cjs",
         "dist/error.umd.cjs.map"
     ],
-    "source": "src/error.js",
+    "source": "src/index.js",
     "module": "dist/error.module.mjs",
     "unpkg": "dist/error.umd.cjs",
     "umd:main": "dist/error.umd.cjs",