diff --git a/SETUP.md b/SETUP.md
index 8c37dc6..4886840 100644
--- a/SETUP.md
+++ b/SETUP.md
@@ -1,5 +1,5 @@
 # Minimum Requirements
-* Python 3.8
+* Python 3.7
 * Node 10.18.1
 * yarn 1.22.x
 
diff --git a/matrix_puppeteer_line/rpc/client.py b/matrix_puppeteer_line/rpc/client.py
index 5897da8..5592fd4 100644
--- a/matrix_puppeteer_line/rpc/client.py
+++ b/matrix_puppeteer_line/rpc/client.py
@@ -13,7 +13,7 @@
 #
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
-from typing import AsyncGenerator, TypedDict, List, Tuple, Dict, Callable, Awaitable, Any
+from typing import AsyncGenerator, List, Tuple, Dict, Callable, Awaitable, Any
 from collections import deque
 from base64 import b64decode
 import asyncio
@@ -22,10 +22,6 @@ from .rpc import RPCClient
 from .types import ChatEvents, ChatListInfo, ChatInfo, ImageData, Message, Participant, Receipt, StartStatus
 
 
-class LoginCommand(TypedDict):
-    content: str
-
-
 class Client(RPCClient):
     async def start(self) -> StartStatus:
         await self.connect()
@@ -113,19 +109,19 @@ class Client(RPCClient):
         data = deque()
         event = asyncio.Event()
 
-        async def qr_handler(req: LoginCommand) -> None:
+        async def qr_handler(req: Dict[str, str]) -> None:
             data.append(("qr", req["url"]))
             event.set()
 
-        async def pin_handler(req: LoginCommand) -> None:
+        async def pin_handler(req: Dict[str, str]) -> None:
             data.append(("pin", req["pin"]))
             event.set()
 
-        async def success_handler(req: LoginCommand) -> None:
+        async def success_handler(req: Dict[str, str]) -> None:
             data.append(("login_success", None))
             event.set()
 
-        async def failure_handler(req: LoginCommand) -> None:
+        async def failure_handler(req: Dict[str, str]) -> None:
             data.append(("login_failure", req.get("reason")))
             event.set()