diff --git a/hwe/ts/PageInheritPoint.vue b/hwe/ts/PageInheritPoint.vue
index a0086396..ec553105 100644
--- a/hwe/ts/PageInheritPoint.vue
+++ b/hwe/ts/PageInheritPoint.vue
@@ -413,7 +413,7 @@ export default defineComponent({
   },
   methods: {
     async buyInheritBuff(buffKey: inheritBuffType) {
-      const level = this.inheritBuff[buffKey];
+      const level = Math.floor(this.inheritBuff[buffKey]);
       const prevLevel = this.prevInheritBuff[buffKey] ?? 0;
       if (level == prevLevel) {
         return;