diff --git a/config.js b/config.js
index d910ead..c0272ac 100644
--- a/config.js
+++ b/config.js
@@ -120,7 +120,7 @@ module.exports = function(){
 					if(diblacklist.indexOf(i)>=0)
 						continue;
 
-					txt += i.slice(2).upper()+" !\n"
+					txt += i.slice(2).toUpperCase()+" !\n"
 				}
 				if(txt.length < 4){
 					return null;