diff --git a/Makefile b/Makefile
index 42bfecddf..48dd7f577 100644
--- a/Makefile
+++ b/Makefile
@@ -36,7 +36,7 @@ formatter:
 
 lint:
 	poetry run ruff check rasa_sdk tests --ignore D
-	poetry run black --check rasa_sdk tests
+	poetry run black --exclude="rasa_sdk/grpc_py" --check rasa_sdk tests
 	make lint-docstrings
 
  # Compare against `main` if no branch was provided
diff --git a/pyproject.toml b/pyproject.toml
index 5a00ed652..139296a36 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,7 @@ build-backend = "poetry.core.masonry.api"
 [tool.black]
 line-length = 88
 target-version = [ "py37", "py38", "py39", "py310",]
-exclude = "((.eggs | .git | .mypy_cache | .pytest_cache | build | dist))"
+exclude = "((.eggs | .git | .mypy_cache | .pytest_cache | build | dist ))"
 
 [tool.poetry]
 name = "rasa-sdk"
@@ -67,11 +67,13 @@ ignore_missing_imports = true
 show_error_codes = true
 warn_redundant_casts = true
 warn_unused_ignores = true
+exclude = "rasa_sdk/grpc_py"
 
 [tool.ruff]
 ignore = [ "D100", "D104", "D105", "RUF005",]
 line-length = 88
 select = [ "D", "E", "F", "W", "RUF",]
+exclude = [ "rasa_sdk/grpc_py" ]
 
 [tool.poetry.dependencies]
 python = ">=3.8,<3.11"
diff --git a/rasa_sdk/cli/arguments.py b/rasa_sdk/cli/arguments.py
index 5a81f5e03..90e282e2c 100644
--- a/rasa_sdk/cli/arguments.py
+++ b/rasa_sdk/cli/arguments.py
@@ -82,7 +82,5 @@ def add_endpoint_arguments(parser: argparse.ArgumentParser) -> None:
         help="Configuration file for the assistant as a yml file.",
     )
     parser.add_argument(
-        "--grpc",
-        help="Starts grpc server instead of http",
-        action="store_true"
+        "--grpc", help="Starts grpc server instead of http", action="store_true"
     )
diff --git a/rasa_sdk/endpoint.py b/rasa_sdk/endpoint.py
index 1745787bb..0a0326042 100644
--- a/rasa_sdk/endpoint.py
+++ b/rasa_sdk/endpoint.py
@@ -172,7 +172,10 @@ async def actions(_) -> HTTPResponse:
         if auto_reload:
             executor.reload()
 
-        body = [action_name_item.model_dump() for action_name_item in executor.list_actions()]  # noqa: E501
+        body = [
+            action_name_item.model_dump()
+            for action_name_item in executor.list_actions()
+        ]
         return response.json(body, status=200)
 
     @app.exception(Exception)
diff --git a/rasa_sdk/executor.py b/rasa_sdk/executor.py
index 2c1c4c2b4..24d4705ec 100644
--- a/rasa_sdk/executor.py
+++ b/rasa_sdk/executor.py
@@ -172,6 +172,7 @@ def utter_image_url(self, image: Text, **kwargs: Any) -> None:
 
 class ActionExecutor:
     """Executes actions."""
+
     def __init__(self) -> None:
         """Initializes the `ActionExecutor`."""
         self.actions: Dict[Text, Callable] = {}
@@ -516,4 +517,5 @@ def list_actions(self) -> List[ActionName]:
 
 class ActionName(BaseModel):
     """Model for action name."""
+
     name: str = Field(alias="name")
diff --git a/rasa_sdk/grpc_server.py b/rasa_sdk/grpc_server.py
index 07f4242e0..20dc62948 100644
--- a/rasa_sdk/grpc_server.py
+++ b/rasa_sdk/grpc_server.py
@@ -45,7 +45,8 @@
 )
 from rasa_sdk.utils import (
     check_version_compatibility,
-    number_of_sanic_workers, file_as_bytes,
+    number_of_sanic_workers,
+    file_as_bytes,
 )
 
 logger = logging.getLogger(__name__)
@@ -53,6 +54,7 @@
 
 class GRPCActionServerHealthCheck(health_pb2_grpc.HealthServiceServicer):
     """Runs health check RPC which is served through gRPC server."""
+
     def __init__(self) -> None:
         """Initializes the HealthServicer."""
         pass
@@ -232,8 +234,8 @@ async def run_grpc(
             f"[::]:{port}",
             server_credentials=grpc.ssl_server_credentials(
                 private_key_certificate_chain_pairs=[(private_key, certificate_chain)],
-                root_certificates = ca_cert,
-                require_client_auth = True if ca_cert else False,
+                root_certificates=ca_cert,
+                require_client_auth=True if ca_cert else False,
             ),
         )
     else:
diff --git a/rasa_sdk/interfaces.py b/rasa_sdk/interfaces.py
index e21462e46..21791f416 100644
--- a/rasa_sdk/interfaces.py
+++ b/rasa_sdk/interfaces.py
@@ -23,7 +23,6 @@ class Tracker:
     @classmethod
     def from_dict(cls, state: "TrackerState") -> "Tracker":
         """Create a tracker from dump."""
-
         return Tracker(
             state["sender_id"],
             state.get("slots", {}),
@@ -49,7 +48,6 @@ def __init__(
         stack: Optional[List[Dict[Text, Any]]] = None,
     ) -> None:
         """Initialize the tracker."""
-
         # list of previously seen events
         self.events = events
         # id of the source of the messages
@@ -72,6 +70,7 @@ def __init__(
 
     @property
     def active_form(self) -> Dict[Text, Any]:
+        """Get the currently active form."""
         warnings.warn(
             "Use of `active_form` is deprecated. Please use `active_loop insteaad.",
             DeprecationWarning,
@@ -80,7 +79,6 @@ def active_form(self) -> Dict[Text, Any]:
 
     def current_state(self) -> Dict[Text, Any]:
         """Return the current tracker state as an object."""
-
         if len(self.events) > 0:
             latest_event_time = self.events[-1].get("timestamp")
         else:
@@ -100,12 +98,11 @@ def current_state(self) -> Dict[Text, Any]:
         }
 
     def current_slot_values(self) -> Dict[Text, Any]:
-        """Return the currently set values of the slots"""
+        """Return the currently set values of the slots."""
         return self.slots
 
     def get_slot(self, key) -> Optional[Any]:
         """Retrieves the value of a slot."""
-
         if key in self.slots:
             return self.slots[key]
         else:
@@ -133,7 +130,6 @@ def get_latest_entity_values(
         Returns:
             List of entity values.
         """
-
         entities = self.latest_message.get("entities", [])
         return (
             x.get("value")
@@ -144,8 +140,7 @@ def get_latest_entity_values(
         )
 
     def get_latest_input_channel(self) -> Optional[Text]:
-        """Get the name of the input_channel of the latest UserUttered event"""
-
+        """Get the name of the input_channel of the latest UserUttered event."""
         for e in reversed(self.events):
             if e.get("event") == "user":
                 return e.get("input_channel")
@@ -229,7 +224,8 @@ def applied_events(self) -> List[Dict[Text, Any]]:
 
         def undo_till_previous(event_type: Text, done_events: List[Dict[Text, Any]]):
             """Removes events from `done_events` until the first
-            occurrence `event_type` is found which is also removed."""
+            occurrence `event_type` is found which is also removed.
+            """
             # list gets modified - hence we need to copy events!
             for e in reversed(done_events[:]):
                 del done_events[-1]
@@ -262,7 +258,6 @@ def slots_to_validate(self) -> Dict[Text, Any]:
         Returns:
             A mapping of extracted slot candidates and their values.
         """
-
         slots: Dict[Text, Any] = {}
         count: int = 0
 
@@ -331,7 +326,6 @@ class Action:
 
     def name(self) -> Text:
         """Unique identifier of this simple action."""
-
         raise NotImplementedError("An action must implement a name")
 
     async def run(
@@ -356,7 +350,6 @@ async def run(
             A dictionary of `rasa_sdk.events.Event` instances that is
                 returned through the endpoint
         """
-
         raise NotImplementedError("An action must implement its run method")
 
     def __str__(self) -> Text:
@@ -365,7 +358,9 @@ def __str__(self) -> Text:
 
 class ActionExecutionRejection(Exception):
     """Raising this exception will allow other policies
-    to predict another action"""
+    to predict another action
+    .
+    """
 
     def __init__(self, action_name: Text, message: Optional[Text] = None) -> None:
         self.action_name = action_name
diff --git a/rasa_sdk/utils.py b/rasa_sdk/utils.py
index c058e033b..b1404b48e 100644
--- a/rasa_sdk/utils.py
+++ b/rasa_sdk/utils.py
@@ -33,6 +33,7 @@
 
 class Element(dict):
     """Represents an element in a list of elements in a rich message."""
+
     __acceptable_keys = ["title", "item_url", "image_url", "subtitle", "buttons"]
 
     def __init__(self, *args, **kwargs):
@@ -46,6 +47,7 @@ def __init__(self, *args, **kwargs):
 
 class Button(dict):
     """Represents a button in a rich message."""
+
     pass