diff --git a/package.json b/package.json
index f455de9..2a7e477 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "vite-plugin-chunk-split",
-  "version": "0.4.3",
+  "version": "0.4.4",
   "description": "A vite plugin for better chunk split",
   "author": "sanyuan0704",
   "main": "dist/index.js",
diff --git a/src/index.ts b/src/index.ts
index 6942175..afb73c3 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -188,6 +188,7 @@ export function chunkSplitPlugin(
       }
       return {
         code: code,
+        map: chunk.map,
       };
     },
   };