diff --git a/src/server/headed-mode-plugin.js b/src/server/headed-mode-plugin.js
index 3479fe9f..cc4c757d 100644
--- a/src/server/headed-mode-plugin.js
+++ b/src/server/headed-mode-plugin.js
@@ -2,7 +2,7 @@ import { globSync } from 'glob';
 
 export function headedMode({ manual, watch, pattern }) {
 
-	const files = globSync(pattern, { ignore: 'node_modules/**' });
+	const files = globSync(pattern, { ignore: 'node_modules/**', posix: true });
 
 	return {
 		name: 'brightspace-headed-mode',