diff --git a/freqtrade/misc.py b/freqtrade/misc.py
index d2b0bfd08..1e84bba87 100644
--- a/freqtrade/misc.py
+++ b/freqtrade/misc.py
@@ -8,7 +8,6 @@ from pathlib import Path
 from typing import Any, Dict, Iterator, List, Mapping, Optional, TextIO, Union
 from urllib.parse import urlparse
 
-import orjson
 import pandas as pd
 import rapidjson
 
@@ -249,17 +248,7 @@ def dataframe_to_json(dataframe: pd.DataFrame) -> str:
     :param dataframe: A pandas DataFrame
     :returns: A JSON string of the pandas DataFrame
     """
-    # https://github.com/pandas-dev/pandas/issues/24889
-    # https://github.com/pandas-dev/pandas/issues/40443
-    # We need to convert to a dict to avoid mem leak
-    def default(z):
-        if isinstance(z, pd.Timestamp):
-            return z.timestamp() * 1e3
-        if z is pd.NaT:
-            return 'NaT'
-        raise TypeError
-
-    return str(orjson.dumps(dataframe.to_dict(orient='split'), default=default), 'utf-8')
+    return dataframe.to_json(orient='split')
 
 
 def json_to_dataframe(data: str) -> pd.DataFrame: