diff --git a/src/modules/classification/dto/classification.dto.ts b/src/modules/classification/dto/classification.dto.ts
index 5c9ebb7..d747bbe 100644
--- a/src/modules/classification/dto/classification.dto.ts
+++ b/src/modules/classification/dto/classification.dto.ts
@@ -22,7 +22,7 @@ export interface PostListInClassificationFolder {
 
   createdAt: Date;
 
-  isRead: boolean;
+  readAt: Date;
 }
 
 export interface ClassificationPostList {
@@ -40,7 +40,7 @@ export interface ClassificationPostList {
 
   createdAt: Date;
 
-  isRead: boolean;
+  readAt: Date;
 }
 
 export class UpdateAIClassificationDto {
diff --git a/src/modules/posts/posts.repository.ts b/src/modules/posts/posts.repository.ts
index 8867950..037c4ca 100644
--- a/src/modules/posts/posts.repository.ts
+++ b/src/modules/posts/posts.repository.ts
@@ -167,14 +167,8 @@ export class PostsRepository {
             url: 1,
             description: 1,
             createdAt: 1,
-            isRead: {
-              $cond: {
-                if: { $eq: ['$readAt', null] },
-                then: false,
-                else: true,
-              },
-            },
-            keywords: '$aiClassification.keywords',
+            readAt: 1,
+            'aiClassification.keywords': 1,
           },
         },
       ])
@@ -266,14 +260,8 @@ export class PostsRepository {
             url: 1,
             description: 1,
             createdAt: 1,
-            isRead: {
-              $cond: {
-                if: { $eq: ['$readAt', null] },
-                then: false,
-                else: true,
-              },
-            },
-            keywords: '$aiClassification.keywords',
+            readAt: 1,
+            'aiClassification.keywords': 1,
           },
         },
       ])