diff --git a/lib/cron.js b/lib/cron.js
index 22994f90..e7998593 100644
--- a/lib/cron.js
+++ b/lib/cron.js
@@ -2,7 +2,7 @@
 	if (typeof define === 'function' && define.amd) {
 		define(['luxon'], factory);
 	} else if (typeof exports === 'object') {
-		module.exports = factory(require('luxon'), require('child_process'));
+		module.exports = factory(require('luxon'), (typeof window === 'undefined' ? require('child_process') : {}));
 	} else {
 		root.Cron = factory(root.luxon);
 	}