diff --git a/src/components/NumberInterval/NumberInterval.tsx b/src/components/NumberInterval/NumberInterval.tsx
index 80cbbad..0678ca2 100644
--- a/src/components/NumberInterval/NumberInterval.tsx
+++ b/src/components/NumberInterval/NumberInterval.tsx
@@ -31,7 +31,7 @@ const NumberInterval: React.FC<NumberIntervalProps> = ({
   }, [value]);
 
   const handleChange = (value: { min: number | string, max: number | string, organizer_joined: boolean }) => {
-    const toNumber = (v: number | string): number => typeof v === 'string' ? Number(v) : v
+    const toNumber = (v: number | string): number => v ? (typeof v === 'string' ? Number(v) : v) : 1
     const { min, max, organizer_joined } = value;
     onChange({ min: toNumber(min), max: toNumber(max), organizer_joined })
   }
diff --git a/src/publish_pages/publishBall/components/SelectStadium/StadiumDetail.scss b/src/publish_pages/publishBall/components/SelectStadium/StadiumDetail.scss
index 22eaede..8bba873 100644
--- a/src/publish_pages/publishBall/components/SelectStadium/StadiumDetail.scss
+++ b/src/publish_pages/publishBall/components/SelectStadium/StadiumDetail.scss
@@ -94,7 +94,7 @@
           font-size: 12px;
           color: rgba(0, 0, 0, 0.90);
           z-index: 2;
-          font-weight: normal;
+          font-weight: 500;
         }
       }
     }