diff --git a/pyproject.toml b/pyproject.toml
index fa7a482..7d150d7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -68,12 +68,9 @@ convention = "numpy"
 
 [tool.mypy]
 ignore_missing_imports = true
-install_types = true
 disallow_untyped_calls = true
 disallow_untyped_defs = true
 disallow_incomplete_defs = true
-non_interactive = true
-no_strict_optional = true
 
 [tool.commitizen]
 version_scheme = "semver"
diff --git a/src/order_matching/executed_trades.py b/src/order_matching/executed_trades.py
index 1ef67b8..bf72a12 100644
--- a/src/order_matching/executed_trades.py
+++ b/src/order_matching/executed_trades.py
@@ -21,7 +21,7 @@ class ExecutedTrades:
         Trades
     """
 
-    def __init__(self, trades: list[Trade] = None) -> None:
+    def __init__(self, trades: list[Trade] | None = None) -> None:
         self._trades: dict[pd.Timestamp, list[Trade]] = defaultdict(list)
         if trades:
             self.add(trades=trades)
diff --git a/src/order_matching/matching_engine.py b/src/order_matching/matching_engine.py
index d506cdd..25e2a1c 100644
--- a/src/order_matching/matching_engine.py
+++ b/src/order_matching/matching_engine.py
@@ -40,14 +40,14 @@ class MatchingEngine:
            timestamp=Timestamp('2023-01-02 00:00:00'))]
     """
 
-    def __init__(self, seed: int = None) -> None:
+    def __init__(self, seed: int | None = None) -> None:
         self._seed = seed
         self._faker = get_faker(seed=seed)
         self._queue = Orders()
         self.unprocessed_orders = OrderBook()
         self._timestamp: pd.Timestamp | None = None
 
-    def match(self, timestamp: pd.Timestamp, orders: Orders = None) -> ExecutedTrades:
+    def match(self, timestamp: pd.Timestamp, orders: Orders | None = None) -> ExecutedTrades:
         """Match incoming orders in price-time priority.
 
         Parameters
diff --git a/src/order_matching/orders.py b/src/order_matching/orders.py
index f8a84d4..a7ff507 100644
--- a/src/order_matching/orders.py
+++ b/src/order_matching/orders.py
@@ -18,7 +18,7 @@ class Orders:
     orders
     """
 
-    def __init__(self, orders: Sequence[Order] = None) -> None:
+    def __init__(self, orders: Sequence[Order] | None = None) -> None:
         self.orders = list() if orders is None else list(orders)
         self._sort_orders_inplace()
 
diff --git a/src/order_matching/random.py b/src/order_matching/random.py
index 564d75f..28fa285 100644
--- a/src/order_matching/random.py
+++ b/src/order_matching/random.py
@@ -2,7 +2,7 @@
 from numpy.random import Generator, default_rng
 
 
-def get_random_generator(seed: int = None) -> Generator:
+def get_random_generator(seed: int | None = None) -> Generator:
     """Get numpy random number generator.
 
     Parameters
@@ -17,7 +17,7 @@ def get_random_generator(seed: int = None) -> Generator:
     return default_rng(seed=seed)
 
 
-def get_faker(seed: int = None) -> Faker:
+def get_faker(seed: int | None = None) -> Faker:
     """Get Faker random generator.
 
     Parameters