diff --git a/pyclient/main.py b/pyclient/main.py
index d0f830a..afa20bf 100644
--- a/pyclient/main.py
+++ b/pyclient/main.py
@@ -218,7 +218,7 @@ def make_target_id(target_id: int) -> bytes:
     byte_string = bytearray(struct.pack("!I", target_id))
     return byte_string
 
-def read_addressable_id(data: bytes) -> Tuple[int, int]:
+def read_addressable_id(data: bytes) -> tuple[int, int]:
     target_id = struct.unpack("!I", data[0:4])[0]
     set_id = struct.unpack("!I", data[4:8])[0]
     return (target_id, set_id)
diff --git a/src/pcdu.rs b/src/pcdu.rs
new file mode 100644
index 0000000..e69de29