diff --git a/imlightgbm/engine.py b/imlightgbm/engine.py
index b9c57dd..4c5384e 100644
--- a/imlightgbm/engine.py
+++ b/imlightgbm/engine.py
@@ -39,7 +39,7 @@ def predict(
             raw_score
             or pred_leaf
             or pred_contrib
-            or isinstance(_predict, spmatrix | list[spmatrix])
+            or isinstance(_predict, spmatrix | list)
         ):
             return _predict
 
diff --git a/imlightgbm/objective/core.py b/imlightgbm/objective/core.py
index 4ee7cde..5e7fd80 100644
--- a/imlightgbm/objective/core.py
+++ b/imlightgbm/objective/core.py
@@ -10,7 +10,7 @@ def _safe_power(num_base: np.ndarray, num_pow: float):
 
 def _safe_log(array: np.ndarray, min_value: float = 1e-6) -> np.ndarray:
     """Safe log."""
-    return np.log(np.clip(array, min_value))
+    return np.log(np.clip(array, min_value, None))
 
 
 def sklearn_binary_focal_objective(