diff --git a/arknights_mower/__main__.py b/arknights_mower/__main__.py
index 067dc79e7..ff2da2d3e 100644
--- a/arknights_mower/__main__.py
+++ b/arknights_mower/__main__.py
@@ -18,6 +18,8 @@
 from arknights_mower.utils.logic_expression import LogicExpression
 from arknights_mower.utils import rapidocr
 
+from evalidate import Expr
+
 conf = {}
 plan = {}
 operators = {}
@@ -456,7 +458,7 @@ def load_state(file="state.json"):
         return None
     with open(state_file, 'r') as f:
         state = json.load(f)
-    operators = {k: eval(v) for k, v in state["operators"].items()}
+    operators = {k: Expr(v).eval() for k, v in state["operators"].items()}
     for k, v in operators.items():
         if not v.time_stamp == "None":
             v.time_stamp = datetime.strptime(v.time_stamp, "%Y-%m-%d %H:%M:%S.%f")
diff --git a/arknights_mower/utils/operators.py b/arknights_mower/utils/operators.py
index 100f646de..642626c63 100644
--- a/arknights_mower/utils/operators.py
+++ b/arknights_mower/utils/operators.py
@@ -3,6 +3,7 @@
 from ..solvers.record import save_action_to_sqlite_decorator
 from ..utils.log import logger
 import copy
+from evalidate import Expr
 
 
 class Operators(object):
@@ -242,7 +243,7 @@ def init_mood_limit(self):
 
     def evaluate_expression(self, expression):
         try:
-            result = eval(expression, {"op_data": self})
+            result = Expr(expression).eval({"op_data": self})
             return result
         except Exception as e:
             logger.exception(f"Error evaluating expression: {e}")
diff --git a/requirements.txt b/requirements.txt
index ad912f5d2..3d1214a53 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -27,3 +27,4 @@ platformdirs==3.11.0
 rapidocr-onnxruntime==1.3.7
 beautifulsoup4==4.12.2
 lxml==4.9.3
+evalidate==2.0.2