diff --git a/src/main/java/com/pandoli365/bibimbap/mapper/PostsMapper.java b/src/main/java/com/pandoli365/bibimbap/mapper/PostsMapper.java
index 9c210e5..119700a 100644
--- a/src/main/java/com/pandoli365/bibimbap/mapper/PostsMapper.java
+++ b/src/main/java/com/pandoli365/bibimbap/mapper/PostsMapper.java
@@ -41,10 +41,10 @@ public interface PostsMapper {
             JOIN post_categories c ON c.id = p.category_id
             WHERE p.status = 'PUBLISHED'
               AND p.is_delete = false
-              AND (#{categoryId} IS NULL OR p.category_id = #{categoryId})
+              AND (#{categoryId}::bigint IS NULL OR p.category_id = #{categoryId}::bigint)
               AND (
-                    #{cursorCreatedAt} IS NULL
-                    OR (p.created_at, p.id) < (#{cursorCreatedAt}, #{cursorId})
+                    #{cursorCreatedAt}::timestamptz IS NULL
+                    OR (p.created_at, p.id) < (#{cursorCreatedAt}::timestamptz, #{cursorId}::bigint)
                   )
             ORDER BY p.created_at DESC, p.id DESC
             LIMIT #{limit}
@@ -119,7 +119,8 @@ public interface PostsMapper {
 
     @Update("""
             UPDATE posts
-            SET title = #{title},
+            SET category_id = #{categoryId},
+                title = #{title},
                 body_markdown = #{bodyMarkdown},
                 body_sanitized_html = #{bodySanitizedHtml},
                 link_url = #{linkUrl},