diff --git a/src/services/reportService.ts b/src/services/reportService.ts
index 7e1af0a..046ae5a 100644
--- a/src/services/reportService.ts
+++ b/src/services/reportService.ts
@@ -140,7 +140,6 @@ export async function getCategoryOverTime(
       month: string;
       category_id: number | null;
       category_name: string;
-      category_type: "expense" | "income" | "transfer";
       total: number;
     }>
   >(
@@ -148,7 +147,6 @@ export async function getCategoryOverTime(
        strftime('%Y-%m', t.date) AS month,
        t.category_id,
        COALESCE(c.name, 'Uncategorized') AS category_name,
-       COALESCE(c.type, 'expense') AS category_type,
        ABS(SUM(t.amount)) AS total
      FROM transactions t
      LEFT JOIN categories c ON t.category_id = c.id