diff --git a/src/store/storageHelper.ts b/src/store/storageHelper.ts
index d3a4fee..767cf3c 100644
--- a/src/store/storageHelper.ts
+++ b/src/store/storageHelper.ts
@@ -34,10 +34,10 @@ export const loadStore = () => {
   }
 }
 
-function serialize(data: string) {
-  return JSON.stringify(btoa(encodeURIComponent(data)))
+function serialize(data: object): string {
+  return btoa(encodeURIComponent(JSON.stringify(data)))
 }
 
-function deserialize(b64: string) {
+function deserialize(b64: string): string  {
   return JSON.parse(decodeURIComponent(atob(b64)))
 }