diff --git a/src/logger/logger.ts b/src/logger/logger.ts
index 6b09c8b..cc3c38d 100644
--- a/src/logger/logger.ts
+++ b/src/logger/logger.ts
@@ -106,7 +106,7 @@ async function getStaticSourceMaps(): Promise<Map<string, SourceMapConsumer>> {
 			)
 				continue; // make sure .map file exists
 			const fileBuff = await fs.readFile(file + '.map');
-			if (URL && typeof Blob !== 'undefined') {
+			if (typeof window !== 'undefined') { // not running in node
 				// only run this stuff if we are running in a browser window
 				const mappingsWasmBuffer = await fs.readFile(
                     path.join(__dirname, '../../node_modules/source-map/lib/mappings.wasm'),