diff --git a/pyproject.toml b/pyproject.toml
index 191e0c2..177aa59 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "sati-ac"
-version = "0.1.0"
+version = "0.1.1"
 authors = [
     { name="sati.ac", email="sati.ac@proton.me" }
 ]
@@ -19,4 +19,4 @@ classifiers = [
 dependencies = ["websockets"]
 
 [project.urls]
-"Homepage" = "https://git.sati.ac/sati.ac/sati-py"
\ No newline at end of file
+"Homepage" = "https://git.sati.ac/sati.ac/sati-py"
diff --git a/sati/sati.py b/sati/sati.py
index aa38b31..d61ee66 100644
--- a/sati/sati.py
+++ b/sati/sati.py
@@ -25,7 +25,7 @@ class Sati:
 
     _socket: SatiSocket
     _project_id: int
-    _awaited_tasks: dict = {}
+    _awaited_tasks: dict
 
     def __init__(
         self,
@@ -35,6 +35,7 @@ class Sati:
         project_id: int = 0,
         debug = False
     ):
+        self._awaited_tasks = {}
         self._socket = SatiSocket(token, reconnection_interval, url, debug)
         self._project_id = project_id
         self._socket.on('taskUpdate', self._process_task)
@@ -63,8 +64,8 @@ class Sati:
         else:
             fut.set_exception(UnableToSolveTask(task))
 
-    def destroy(self):
-        self._socket.close()
+    async def destroy(self):
+        await self._socket.close()
 
     async def get_balance(self) -> float:
         return (await self._socket.call('getBalance')).balance
diff --git a/sati/socket.py b/sati/socket.py
index 9a5ff00..0257481 100644
--- a/sati/socket.py
+++ b/sati/socket.py
@@ -36,11 +36,11 @@ class SatiSocket:
     __reconnection_interval: float
     __connector_ref: asyncio.Task
     __id_counter: int = 0
-    __awaited_replies: dict = {}
+    __awaited_replies: dict
     __error = None
-    __queue = []
+    __queue: list
     __url: str
-    __event_handlers = {}
+    __event_handlers: dict
     __debug: bool
 
     def __init__(
@@ -50,6 +50,9 @@ class SatiSocket:
         url = 'wss://api.sati.ac/ws',
         debug = False
     ):
+        self.__awaited_replies = {}
+        self.__queue = []
+        self.__event_handlers = {}
         self.__token = token
         self.__reconnection_interval = reconnection_interval
         self.__url = url
@@ -117,7 +120,9 @@ class SatiSocket:
         if msg_type in ( 'auth', 'call' ):
             return await fut
 
-    async def call(self, method: str, data: dict = {}) -> SatiDict:
+    async def call(self, method: str, data: dict | None = None) -> SatiDict:
+        if data == None: data = {}
+
         if self.__state == STATE_CONNECTED:
             resp = await self.__send('call', {
                 'method': method,
@@ -154,8 +159,9 @@ class SatiSocket:
                 del self.__awaited_replies[key]
             raise ex
 
-    def close(self):
+    async def close(self):
         self.__connector_ref.cancel()
+        await self.__socket.close()
 
     def on(self, event: str, handler: typing.Callable[[SatiDict], None]):
         if event not in self.__event_handlers: