diff --git a/finnow-api/source/transaction/data.d b/finnow-api/source/transaction/data.d
index f98e045..33b629c 100644
--- a/finnow-api/source/transaction/data.d
+++ b/finnow-api/source/transaction/data.d
@@ -27,7 +27,7 @@ interface TransactionCategoryRepository {
     TransactionCategory[] findAllByParentId(Optional!ulong parentId);
     TransactionCategory insert(Optional!ulong parentId, string name, string description, string color);
     void deleteById(ulong id);
-    TransactionCategory updateById(ulong id, string name, string description, string color);
+    TransactionCategory updateById(ulong id, string name, string description, string color, Optional!ulong parentId);
 }
 
 interface TransactionTagRepository {
diff --git a/finnow-api/source/transaction/data_impl_sqlite.d b/finnow-api/source/transaction/data_impl_sqlite.d
index 44e9293..2a342f8 100644
--- a/finnow-api/source/transaction/data_impl_sqlite.d
+++ b/finnow-api/source/transaction/data_impl_sqlite.d
@@ -133,13 +133,13 @@ class SqliteTransactionCategoryRepository : TransactionCategoryRepository {
         util.sqlite.deleteById(db, "transaction_category", id);
     }
 
-    TransactionCategory updateById(ulong id, string name, string description, string color) {
+    TransactionCategory updateById(ulong id, string name, string description, string color, Optional!ulong parentId) {
         util.sqlite.update(
             db,
             "UPDATE transaction_category
-            SET name = ?, description = ?, color = ?
+            SET name = ?, description = ?, color = ?, parent_id = ?
             WHERE id = ?",
-            name, description, color, id
+            name, description, color, toNullable!ulong(parentId), id
         );
         return findById(id).orElseThrow();
     }
diff --git a/finnow-api/source/transaction/service.d b/finnow-api/source/transaction/service.d
index 280a7c3..c35a0e8 100644
--- a/finnow-api/source/transaction/service.d
+++ b/finnow-api/source/transaction/service.d
@@ -390,7 +390,8 @@ TransactionCategoryResponse updateCategory(ProfileDataSource ds, ulong categoryI
         categoryId,
         payload.name,
         payload.description,
-        payload.color
+        payload.color,
+        toOptional!ulong(payload.parentId)
     );
     return TransactionCategoryResponse.of(curr);
 }