diff --git a/src/hooks/useStateWithLocalStorage.ts b/src/hooks/useStateWithLocalStorage.ts
index a20f08f..5981b2e 100644
--- a/src/hooks/useStateWithLocalStorage.ts
+++ b/src/hooks/useStateWithLocalStorage.ts
@@ -10,7 +10,7 @@ export default function useStateWithLocalStorage<T>(
   useEffect(() => {
     try {
       const item = localStorage.getItem(key);
-      if (item !== undefined && item !== null) {
+      if (item !== "undefined" && item !== null) {
         setValue(JSON.parse(item) as T);
       } else {
         setValue(initialValue);
@@ -23,7 +23,7 @@ export default function useStateWithLocalStorage<T>(
   }, [initialValue, key]);
 
   useEffect(() => {
-    localStorage.setItem(key, JSON.stringify(value));
+    if (value !== undefined) localStorage.setItem(key, JSON.stringify(value));
   }, [value, key]);
 
   return [value, setValue];