diff --git a/lib/helpers.js b/lib/helpers.js
index 9be7820..b254c31 100644
--- a/lib/helpers.js
+++ b/lib/helpers.js
@@ -74,5 +74,5 @@ export const flatten = (arr) => {
 };
 
 export const removeSymbols = string => {
-  return string.replace(/\W/g, '');
+  return string.toString().replace(/\W/g, '');
 };