diff --git a/dictation_server/src/repositories/tasks/tasks.repository.service.ts b/dictation_server/src/repositories/tasks/tasks.repository.service.ts
index a2d2541..28f8226 100644
--- a/dictation_server/src/repositories/tasks/tasks.repository.service.ts
+++ b/dictation_server/src/repositories/tasks/tasks.repository.service.ts
@@ -452,7 +452,16 @@ const makeOrder = (
         file: { uploaded_at: direction },
         id: 'ASC',
       };
+    case 'WORK_TYPE':
+      return {
+        priority: 'ASC',
+        file: { work_type_id: direction },
+        id: 'ASC',
+      };
     default:
+      // switchのcase漏れが発生した場合に型エラーになるようにする
+      // eslint-disable-next-line @typescript-eslint/no-unused-vars
+      const _: never = sort_criteria;
       throw new Error();
   }
 };