diff --git a/tsup.config.ts b/tsup.config.ts
index 92b70ab..1593055 100644
--- a/tsup.config.ts
+++ b/tsup.config.ts
@@ -10,6 +10,7 @@ export default defineConfig({
   dts: true,
   clean: true,
   sourcemap: true,
+  external: ['@preact/signals-core', 'mutative', 'inline-schema'],
   plugins: [csvLoader()],
   esbuildOptions(options) {
     options.alias = {