diff --git a/packages/sync-engine/package.json b/packages/sync-engine/package.json
index 15982792e..51d90d670 100644
--- a/packages/sync-engine/package.json
+++ b/packages/sync-engine/package.json
@@ -18,7 +18,7 @@
   "scripts": {
     "clean": "rimraf dist",
     "prebuild": "npm run clean",
-    "build": "tsup src/index.ts --format esm,cjs --dts && cp -r src/database/migrations dist/migrations",
+    "build": "tsup src/index.ts --format esm,cjs --dts --shims && cp -r src/database/migrations dist/migrations",
     "lint": "eslint src --ext .ts"
   },
   "files": [