diff --git a/src/main/java/run/halo/app/model/vo/CommentVO.java b/src/main/java/run/halo/app/model/vo/CommentVO.java
deleted file mode 100644
index b823960d8..000000000
--- a/src/main/java/run/halo/app/model/vo/CommentVO.java
+++ /dev/null
@@ -1,22 +0,0 @@
-package run.halo.app.model.vo;
-
-import lombok.Data;
-import lombok.ToString;
-import run.halo.app.model.dto.CommentDTO;
-
-import java.util.List;
-
-/**
- * Comment vo.
- *
- * @author johnniang
- * @date 3/25/19
- */
-@Data
-@ToString(callSuper = true)
-@Deprecated
-public class CommentVO extends CommentDTO {
-
-    private List<CommentVO> children;
-
-}
diff --git a/src/main/java/run/halo/app/model/vo/CommentWithParentVO.java b/src/main/java/run/halo/app/model/vo/CommentWithParentVO.java
deleted file mode 100644
index bbd3e2f59..000000000
--- a/src/main/java/run/halo/app/model/vo/CommentWithParentVO.java
+++ /dev/null
@@ -1,35 +0,0 @@
-package run.halo.app.model.vo;
-
-import lombok.Data;
-import lombok.EqualsAndHashCode;
-import lombok.ToString;
-import lombok.extern.slf4j.Slf4j;
-import run.halo.app.model.dto.CommentDTO;
-
-/**
- * Comment list with parent comment vo.
- *
- * @author johnniang
- * @date 3/31/19
- */
-@Data
-@ToString(callSuper = true)
-@EqualsAndHashCode(callSuper = true)
-@Slf4j
-@Deprecated
-public class CommentWithParentVO extends CommentDTO implements Cloneable {
-
-    /**
-     * Parent comment.
-     */
-    private CommentWithParentVO parent;
-
-    public CommentWithParentVO clone() {
-        try {
-            return (CommentWithParentVO) super.clone();
-        } catch (CloneNotSupportedException e) {
-            log.error("Clone not support exception", e);
-            return null;
-        }
-    }
-}
diff --git a/src/main/java/run/halo/app/service/base/BaseCommentService.java b/src/main/java/run/halo/app/service/base/BaseCommentService.java
index 4020a5a74..804379bf6 100644
--- a/src/main/java/run/halo/app/service/base/BaseCommentService.java
+++ b/src/main/java/run/halo/app/service/base/BaseCommentService.java
@@ -28,7 +28,6 @@ public interface BaseCommentService<COMMENT extends BaseComment> extends CrudSer
      * %s: parent commentator author name
      * %s: comment content
      */
-    @Deprecated
     String COMMENT_TEMPLATE = "<a href='#comment-id-%d'>@%s</a> %s";
 
     /**
diff --git a/src/main/java/run/halo/app/service/base/BaseCommentServiceImpl.java b/src/main/java/run/halo/app/service/base/BaseCommentServiceImpl.java
index bd4279e43..4cb8c29ec 100644
--- a/src/main/java/run/halo/app/service/base/BaseCommentServiceImpl.java
+++ b/src/main/java/run/halo/app/service/base/BaseCommentServiceImpl.java
@@ -26,7 +26,6 @@ import run.halo.app.model.properties.CommentProperties;
 import run.halo.app.model.support.CommentPage;
 import run.halo.app.model.vo.BaseCommentVO;
 import run.halo.app.model.vo.BaseCommentWithParentVO;
-import run.halo.app.model.vo.CommentWithParentVO;
 import run.halo.app.repository.PostRepository;
 import run.halo.app.repository.base.BaseCommentRepository;
 import run.halo.app.security.authentication.Authentication;
@@ -183,7 +182,7 @@ public abstract class BaseCommentServiceImpl<COMMENT extends BaseComment> extend
 
                 if (parentComment != null) {
                     // Convert to parent comment vo
-                    parentCommentVo = new CommentWithParentVO().convertFrom(parentComment);
+                    parentCommentVo = new BaseCommentWithParentVO().convertFrom(parentComment);
                     // Cache the parent comment vo
                     parentCommentVoMap.put(parentComment.getId(), parentCommentVo);
                 }