diff --git a/requirements.txt b/requirements.txt
index f932e1074..888d4581c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 requests
-numpy
+numpy < 2.0.0
 pandas >=0.18.1
 python-dateutil >=2.5.3
 six >=1.10.0
diff --git a/rqalpha/mod/rqalpha_mod_sys_accounts/position_model.py b/rqalpha/mod/rqalpha_mod_sys_accounts/position_model.py
index ddd69c16a..630039280 100644
--- a/rqalpha/mod/rqalpha_mod_sys_accounts/position_model.py
+++ b/rqalpha/mod/rqalpha_mod_sys_accounts/position_model.py
@@ -210,8 +210,8 @@ def _handle_split(self, trading_date, data_proxy):
         self._last_price /= ratio
         ratio = Decimal(ratio)
         # int(6000 * 1.15) -> 6899
-        self._old_quantity = self._quantity = int(Decimal(self._quantity) * ratio)
-        self._logical_old_quantity = int(Decimal(self._logical_old_quantity) * ratio)
+        self._old_quantity = self._quantity = round(Decimal(self._quantity) * ratio)
+        self._logical_old_quantity = round(Decimal(self._logical_old_quantity) * ratio)
 
 
 class FuturePosition(Position):
diff --git a/setup.py b/setup.py
index 8542a6a32..10c9debcf 100644
--- a/setup.py
+++ b/setup.py
@@ -17,7 +17,7 @@
 
 requirements = [
     'requests',
-    'numpy',
+    'numpy < 2.0.0',
     'pandas >=1.0.5',
     'python-dateutil',
     'six',
diff --git a/tests/outs/test_f_mean_reverting.pkl b/tests/outs/test_f_mean_reverting.pkl
index d51df58e0..5c6e356b5 100644
Binary files a/tests/outs/test_f_mean_reverting.pkl and b/tests/outs/test_f_mean_reverting.pkl differ
diff --git a/tests/outs/test_f_tick_size.pkl b/tests/outs/test_f_tick_size.pkl
index c45cb60eb..e379872e6 100644
Binary files a/tests/outs/test_f_tick_size.pkl and b/tests/outs/test_f_tick_size.pkl differ