diff --git a/nwb.config.js b/nwb.config.js
index 6220dd5..8e889cf 100644
--- a/nwb.config.js
+++ b/nwb.config.js
@@ -18,7 +18,7 @@ module.exports = {
       'moment-timezone': 'moment-timezone/builds/moment-timezone-with-data-2012-2022.js',
     },
 
-    autoprefixer: '> 1%, last 2 versions, Firefox ESR, ios >= 8',
+    autoprefixer: '> 1%, last 4 versions, Firefox ESR, ios >= 8',
 
     config(config) {
       // Change config as you wish