diff --git a/package.json b/package.json
index c47420c..0e6a244 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,7 @@
   "main": "lib/main.js",
   "scripts": {
     "build": "tsc",
-    "build:watch": "tsc --watch",
+    "build:watch": "tsc --watch --sourceMap",
     "format": "prettier --write '**/*.ts'",
     "format-check": "prettier --check '**/*.ts'",
     "lint": "eslint src/**/*.ts",