diff --git a/qlib/contrib/backtest/position.py b/qlib/contrib/backtest/position.py
index 6c269d505..5a6b102b2 100644
--- a/qlib/contrib/backtest/position.py
+++ b/qlib/contrib/backtest/position.py
@@ -166,7 +166,7 @@ class Position:
     def save_position(self, path, last_trade_date):
         path = pathlib.Path(path)
         p = copy.deepcopy(self.position)
-        cash = pd.Series(dtype=np.float)
+        cash = pd.Series(dtype=float)
         cash["init_cash"] = self.init_cash
         cash["cash"] = p["cash"]
         cash["today_account_value"] = p["today_account_value"]
diff --git a/qlib/data/dataset/__init__.py b/qlib/data/dataset/__init__.py
index 0f5d2baba..ef7bfa67e 100644
--- a/qlib/data/dataset/__init__.py
+++ b/qlib/data/dataset/__init__.py
@@ -299,7 +299,7 @@ class TSDataSampler:
             # get the previous index of a line given index
         """
         # object incase of pandas converting int to flaot
-        idx_df = pd.Series(range(data.shape[0]), index=data.index, dtype=np.object)
+        idx_df = pd.Series(range(data.shape[0]), index=data.index, dtype=object)
         idx_df = lazy_sort_index(idx_df.unstack())
         # NOTE: the correctness of `__getitem__` depends on columns sorted here
         idx_df = lazy_sort_index(idx_df, axis=1)