diff --git a/src/useAntdResizableHeader.tsx b/src/useAntdResizableHeader.tsx
index 059d5d9..045e545 100644
--- a/src/useAntdResizableHeader.tsx
+++ b/src/useAntdResizableHeader.tsx
@@ -197,7 +197,7 @@ function useAntdResizableHeader<ColumnType extends ColumnOriginType<ColumnType>>
           loop(cls[i].children as ColumnType[])
         } else {
           if (!cls[i].hideInTable) {
-            width += cls[i].width ?? defaultWidth
+            width += Number(cls[i].width) || defaultWidth
           }
         }
       }