diff --git a/.nvmdrc b/.nvmdrc
index 801a2a0..10900cd 100644
--- a/.nvmdrc
+++ b/.nvmdrc
@@ -1 +1 @@
-23.8.0
\ No newline at end of file
+25.7.0
\ No newline at end of file
diff --git a/src/components/sort-college/DataTable.vue b/src/components/sort-college/DataTable.vue
index 16e8b8e..4d1873c 100644
--- a/src/components/sort-college/DataTable.vue
+++ b/src/components/sort-college/DataTable.vue
@@ -81,7 +81,7 @@
   ]);
 
   const rankDiff = (index: number, item: any) => {
-    return index === props.data.length - 1 ? item["rankLine"] : item["rankLine"] - props.data[index + 1]["rankLine"];
+    return index === props.data.length - 1 ? item["rankLine"] !== '--' ?  item["rankLine"] - props.data[index + 1]["rankLine"] : '--' : '--';
   };
 
   const recompileData = computed(() => {
@@ -93,7 +93,7 @@
           ? '--'
           : item['rankLine'] - props.lowscoreRank
         : rankDiff(index, item)
-    item['lineDiff'] = item['score'] - props.score
+    item['lineDiff'] = item['score'] !== '--' ? item['score'] - props.score : '--'
     return item
   })
     return _data;