diff --git a/smarttree/_classes.py b/smarttree/_classes.py
index 2bfee93..5f386df 100644
--- a/smarttree/_classes.py
+++ b/smarttree/_classes.py
@@ -213,10 +213,6 @@ def _check_is_fitted(self) -> None:
     def predict(self, X: pd.DataFrame) -> list[str]:
         raise NotImplementedError
 
-    @abstractmethod
-    def predict_proba(self, X: pd.DataFrame) -> NDArray:
-        raise NotImplementedError
-
     @abstractmethod
     def score(self,
         X: pd.DataFrame,