diff --git a/pybandits/base.py b/pybandits/base.py
index 53dcd5e..818599f 100644
--- a/pybandits/base.py
+++ b/pybandits/base.py
@@ -129,9 +129,9 @@ def _get_valid_actions(self, forbidden_actions: Optional[Set[ActionId]]) -> Set[
         return valid_actions
 
     def _check_update_params(
-            self,
-            actions: List[ActionId],
-            rewards: List[Union[NonNegativeInt, List[NonNegativeInt]]],
+        self,
+        actions: List[ActionId],
+        rewards: List[Union[NonNegativeInt, List[NonNegativeInt]]],
     ):
         """
         Verify that the given list of action IDs is a subset of the currently defined actions.
@@ -152,11 +152,11 @@ def _check_update_params(
     @abstractmethod
     @validate_arguments
     def update(
-            self,
-            actions: List[ActionId],
-            rewards: List[Union[BinaryReward, List[BinaryReward]]],
-            *args,
-            **kwargs,
+        self,
+        actions: List[ActionId],
+        rewards: List[Union[BinaryReward, List[BinaryReward]]],
+        *args,
+        **kwargs,
     ):
         """
         Update the stochastic multi-armed bandit model.
@@ -190,14 +190,14 @@ def predict(self, forbidden_actions: Optional[Set[ActionId]] = None):
 
     def get_state(self) -> (str, dict):
         """
-           Access the complete model internal state, enough to create an exact copy of the same model from it.
-           Returns
-           -------
-           model_class_name: str
-               The name of the class of the model.
-           model_state: dict
-               The internal state of the model (actions, scores, etc.).
-           """
+        Access the complete model internal state, enough to create an exact copy of the same model from it.
+        Returns
+        -------
+        model_class_name: str
+            The name of the class of the model.
+        model_state: dict
+            The internal state of the model (actions, scores, etc.).
+        """
         model_name = self.__class__.__name__
         state: dict = self.dict()
         return model_name, state