diff --git a/wherehows-dao/src/main/java/wherehows/models/table/DatasetComment.java b/wherehows-dao/src/main/java/wherehows/models/table/DatasetComment.java
index e17ef9e135..71de397e62 100644
--- a/wherehows-dao/src/main/java/wherehows/models/table/DatasetComment.java
+++ b/wherehows-dao/src/main/java/wherehows/models/table/DatasetComment.java
@@ -21,8 +21,8 @@ public class DatasetComment {
     public String authorName;
     public String authorUserName;
     public String authorEmail;
-    public String created;
-    public String modified;
+    public long created;
+    public long modified;
     public String type;
     public Boolean isAuthor;
 }
\ No newline at end of file
diff --git a/wherehows-frontend/app/controllers/api/v1/Dataset.java b/wherehows-frontend/app/controllers/api/v1/Dataset.java
index d6d815f1b0..bbe810e6ec 100644
--- a/wherehows-frontend/app/controllers/api/v1/Dataset.java
+++ b/wherehows-frontend/app/controllers/api/v1/Dataset.java
@@ -451,6 +451,10 @@ public class Dataset extends Controller {
     Map<String, String[]> params = request().body().asFormUrlEncoded();
 
     if (StringUtils.isNotBlank(username)) {
+      if (!params.containsKey("id")) {
+        params.put("id", new String[]{String.valueOf(commentId)});
+      }
+
       if (DatasetsDAO.postComment(id, params, username)) {
         result.put("status", "success");
         return ok(result);
diff --git a/wherehows-frontend/app/dao/DatasetCommentRowMapper.java b/wherehows-frontend/app/dao/DatasetCommentRowMapper.java
index 226d3e3441..028eba9c96 100644
--- a/wherehows-frontend/app/dao/DatasetCommentRowMapper.java
+++ b/wherehows-frontend/app/dao/DatasetCommentRowMapper.java
@@ -13,6 +13,7 @@
  */
 package dao;
 
+import java.sql.Timestamp;
 import wherehows.models.table.DatasetComment;
 import org.apache.commons.lang3.StringUtils;
 import org.springframework.jdbc.core.RowMapper;
@@ -34,13 +35,13 @@ public class DatasetCommentRowMapper implements RowMapper<DatasetComment>
     public static String USER_NAME_COLUMN = "username";
 
     @Override
-    public DatasetComment mapRow(ResultSet rs, int rowNum) throws SQLException    {
+    public DatasetComment mapRow(ResultSet rs, int rowNum) throws SQLException {
 
         int id = rs.getInt(ID_COLUMN);
         int datasetId = rs.getInt(DATASET_ID_COLUMN);
         String text = rs.getString(TEXT_COLUMN);
-        String created = rs.getString(CREATED_TIME_COLUMN);
-        String modified = rs.getString(MODIFIED_TIME_COLUMN);
+        Timestamp created = rs.getTimestamp(CREATED_TIME_COLUMN);
+        Timestamp modified = rs.getTimestamp(MODIFIED_TIME_COLUMN);
         String type = rs.getString(COMMENT_TYPE_COLUMN);
         if (StringUtils.isBlank(type))
         {
@@ -53,8 +54,8 @@ public class DatasetCommentRowMapper implements RowMapper<DatasetComment>
         datasetComment.id = id;
         datasetComment.datasetId = datasetId;
         datasetComment.text = text;
-        datasetComment.created = created;
-        datasetComment.modified = modified;
+        datasetComment.created = created.getTime();
+        datasetComment.modified = modified.getTime();
         datasetComment.type = type;
         datasetComment.authorName = authorName;
         datasetComment.authorEmail = authorEmail;
diff --git a/wherehows-frontend/app/dao/DatasetsDAO.java b/wherehows-frontend/app/dao/DatasetsDAO.java
index 11bca61b62..5f47fbb29d 100644
--- a/wherehows-frontend/app/dao/DatasetsDAO.java
+++ b/wherehows-frontend/app/dao/DatasetsDAO.java
@@ -221,6 +221,9 @@ public class DatasetsDAO extends AbstractMySQLOpenSourceDAO
 	private final static String CREATE_DATASET_COMMENT = "INSERT INTO comments " +
 			"(text, user_id, dataset_id, created, modified, comment_type) VALUES(?, ?, ?, NOW(), NOW(), ?)";
 
+	private final static String UPDATE_DATASET_COMMENT = "UPDATE comments " +
+			"SET text = ?, comment_type = ?, modified = NOW() WHERE id = ?";
+
 	private final static String GET_WATCHED_URN_ID = "SELECT id FROM watch " +
 			"WHERE user_id = ? and item_type = 'urn' and urn = ?";
 
@@ -245,9 +248,6 @@ public class DatasetsDAO extends AbstractMySQLOpenSourceDAO
 	private final static String CREATE_COLUMN_COMMENT = "INSERT INTO field_comments " +
 			"(comment, user_id, created, modified, comment_crc32_checksum) VALUES(?, ?, NOW(), NOW(), CRC32(?))";
 
-	private final static String UPDATE_DATASET_COMMENT = "UPDATE comments " +
-			"SET text = ?, comment_type = ?, modified = NOW() WHERE id = ?";
-
 	private final static String UPDATE_COLUMN_COMMENT = "UPDATE field_comments " +
 			"SET comment = ?, modified = NOW() WHERE id = ?";