diff --git a/packages/ts-plugin/examples/typescript/rollup.config.js b/packages/ts-plugin/examples/typescript/rollup.config.js
index 1924b9f..f49ed2a 100644
--- a/packages/ts-plugin/examples/typescript/rollup.config.js
+++ b/packages/ts-plugin/examples/typescript/rollup.config.js
@@ -3,6 +3,7 @@ import sourcemaps from 'rollup-plugin-sourcemaps';
 export default {
   input: 'lib/index.js',
   plugins: [sourcemaps()],
+  external: ['@syndicate-lang/core'],
   output: {
     file: 'index.js',
     format: 'umd',