diff --git a/src/components/OptionModal.tsx b/src/components/OptionModal.tsx
index cc801ea..db113e9 100644
--- a/src/components/OptionModal.tsx
+++ b/src/components/OptionModal.tsx
@@ -116,8 +116,8 @@ const OptionModal = () => {
           value={shotai}
           onChange={handleShotaiChange}
         >
-          <option value={0}>{t('mincho style')}</option>
-          <option value={1}>{t('gothic style')}</option>
+          <option value={KShotai.kMincho}>{t('mincho style')}</option>
+          <option value={KShotai.kGothic}>{t('gothic style')}</option>
         </select>
 
         <div>{t('show stroke center line')}</div>
diff --git a/src/reducers/index.ts b/src/reducers/index.ts
index 56db17f..9875384 100644
--- a/src/reducers/index.ts
+++ b/src/reducers/index.ts
@@ -71,7 +71,7 @@ const initialState: AppState = {
     spacingY: 20,
   },
   showStrokeCenterLine: ShowCenterLine.selection,
-  shotai: 0, // kMincho
+  shotai: KShotai.kMincho,
   xorMaskType: "none",
 };