diff --git a/src/components/KanjiList.tsx b/src/components/KanjiList.tsx
index 20cbd19..78b32bb 100644
--- a/src/components/KanjiList.tsx
+++ b/src/components/KanjiList.tsx
@@ -15,7 +15,7 @@ const KanjiList = () => {
     let kanjis: KanjiListByGrade = useSelector(state => state.kanjiReducer.kanjis);
 
     const [selectedItems, setSelectedItems] = useState<{title: string, data: Kanji[]}[]>([]);
-    const updateSelectedItems = (item: string, isSelected: Boolean) => {
+    const updateSelectedItems = (item: string, isSelected: boolean) => {
         if (!isSelected) {
             setSelectedItems([...selectedItems, {
                 title: item,
diff --git a/src/redux/store.ts b/src/redux/store.ts
index d37fd69..40c6d94 100644
--- a/src/redux/store.ts
+++ b/src/redux/store.ts
@@ -11,7 +11,7 @@ const reducer = {
 const store = configureStore(
 	{
 		reducer,
-		middleware: getDefaultMiddleware({
+		middleware: (getDefaultMiddleware) => getDefaultMiddleware({
 			serializableCheck: {
 				ignoredActions: [SET_KANJIS, SET_PLAYGROUND_LIST, SET_SELECTED_KANJI],
 				ignoredActionPaths: ['kanjiReducer'],