diff --git a/packages/core/tsup.config.ts b/packages/core/tsup.config.ts
index c5ce8390..b82cbf46 100644
--- a/packages/core/tsup.config.ts
+++ b/packages/core/tsup.config.ts
@@ -1,5 +1,5 @@
 import {defineConfig} from 'tsup';
-import packageJson from './package.json' assert {type: 'json'};
+import packageJson from './package.json' with {type: 'json'};
 
 export default defineConfig({
   entry: ['src/index.ts'],