diff --git a/mahjong/hand_calculating/hand.py b/mahjong/hand_calculating/hand.py
index d7918cd..f57c29e 100644
--- a/mahjong/hand_calculating/hand.py
+++ b/mahjong/hand_calculating/hand.py
@@ -192,7 +192,7 @@ def estimate_hand_value(
 
         config = config or HandConfig()
 
-        hand_yaku = []
+        hand_yaku: list[Yaku] = []
         scores_calculator = scores_calculator_factory()
         tiles_34 = TilesConverter.to_34_array(tiles)
 
@@ -535,7 +535,7 @@ def estimate_hand_value(
                     if not is_aotenjou:
                         hand_yaku = yakuman_list
                     else:
-                        scores_calculator.aotenjou_filter_yaku(hand_yaku, config)  # ty: ignore[unresolved-attribute]
+                        scores_calculator.aotenjou_filter_yaku(hand_yaku, config)
                         yakuman_list = []
 
                 # calculate han
diff --git a/pyproject.toml b/pyproject.toml
index 6617a3f..9d3158c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -55,7 +55,7 @@ lint = [
     "ruff>=0.15.0,<0.16",
 ]
 typing = [
-    "ty>=0.0.17",
+    "ty>=0.0.42",
 ]
 test = [
     "pytest>=9.0.2,<10",