diff --git a/litecord/gateway/opcodes.py b/litecord/gateway/opcodes.py
index bbcdd55..2f9596b 100644
--- a/litecord/gateway/opcodes.py
+++ b/litecord/gateway/opcodes.py
@@ -44,3 +44,5 @@ class OP:
 
     # request for lazy guilds
     LAZY_REQUEST = 14
+
+    UNKNOWN_1 = 23
diff --git a/litecord/gateway/websocket.py b/litecord/gateway/websocket.py
index 6b2e0db..5b5b33a 100644
--- a/litecord/gateway/websocket.py
+++ b/litecord/gateway/websocket.py
@@ -961,6 +961,10 @@ class GatewayWebsocket:
                 self.state.session_id, ranges
             )
 
+    async def _handle_23(self, payload):
+        # TODO reverse-engineer opcode 23, sent by client
+        pass
+
     async def _process_message(self, payload):
         """Process a single message coming in from the client."""
         try: