diff --git a/build.js b/build.js
index 0b47f69..208d4a1 100644
--- a/build.js
+++ b/build.js
@@ -76,8 +76,8 @@ async function downloadTypescript(outFile) {
 
         console.log('Minifying typescript...');
 
-        const minified = { code: (await fs.readFile('tmp/typescript-es5.js')).toString() };
-        // if (minified.error) throw minified.error;
+        const minified = minify((await fs.readFile('tmp/typescript-es5.js')).toString());
+        if (minified.error) throw minified.error;
 
         // Patch unsupported regex syntax
         minified.code = minified.code.replaceAll('[-/\\\\^$*+?.()|[\\]{}]', '[-/\\\\^$*+?.()|\\[\\]{}]');