diff --git a/pyvisa_sim/channels.py b/pyvisa_sim/channels.py
index d204dca..2816efc 100644
--- a/pyvisa_sim/channels.py
+++ b/pyvisa_sim/channels.py
@@ -71,7 +71,6 @@ class Channels(Component):
     can_select: bool
 
     def __init__(self, device: "Device", ids: List[str], can_select: bool):
-
         super(Channels, self).__init__()
         self.can_select: bool = can_select
         self._selected = None
@@ -194,9 +193,9 @@ def _match_setters(self, query: bytes) -> Optional[OptionalBytes]:
             try:
                 if isinstance(parsed, dict) and "ch_id" in parsed:
                     self._selected = parsed["ch_id"]
-                    self._properties[name].set_value(parsed["0"])
+                    self._properties[name].set_value(str(parsed["0"]))
                 else:
-                    self._properties[name].set_value(parsed)
+                    self._properties[name].set_value(str(parsed))
                 return response
             except ValueError:
                 if isinstance(error_response, bytes):
diff --git a/pyvisa_sim/devices.py b/pyvisa_sim/devices.py
index 70a046b..ba4a197 100644
--- a/pyvisa_sim/devices.py
+++ b/pyvisa_sim/devices.py
@@ -122,7 +122,6 @@ class Device(Component):
     delimiter: bytes
 
     def __init__(self, name: str, delimiter: bytes) -> None:
-
         super(Device, self).__init__()
         self.name = name
         self.delimiter = delimiter
diff --git a/pyvisa_sim/sessions/gpib.py b/pyvisa_sim/sessions/gpib.py
index d18e1ee..ded9110 100644
--- a/pyvisa_sim/sessions/gpib.py
+++ b/pyvisa_sim/sessions/gpib.py
@@ -15,7 +15,6 @@
 
 @session.Session.register(constants.InterfaceType.gpib, "INSTR")
 class GPIBInstrumentSession(session.Session):
-
     parsed: rname.GPIBInstr
 
     def after_parsing(self) -> None:
diff --git a/pyvisa_sim/sessions/serial.py b/pyvisa_sim/sessions/serial.py
index f6416ce..f1dbbf0 100644
--- a/pyvisa_sim/sessions/serial.py
+++ b/pyvisa_sim/sessions/serial.py
@@ -16,7 +16,6 @@
 
 @session.Session.register(constants.InterfaceType.asrl, "INSTR")
 class SerialInstrumentSession(session.Session):
-
     parsed: rname.ASRLInstr
 
     def after_parsing(self) -> None:
@@ -25,7 +24,6 @@ def after_parsing(self) -> None:
         )
 
     def read(self, count: int) -> Tuple[bytes, constants.StatusCode]:
-
         # TODO: Implement VI_ATTR_SUPPRESS_END_EN
         end_in, _ = self.get_attribute(constants.ResourceAttribute.asrl_end_in)
 
@@ -56,7 +54,6 @@ def read(self, count: int) -> Tuple[bytes, constants.StatusCode]:
                     return out, constants.StatusCode.success_termination_character_read
 
             elif end_in == constants.SerialTermination.last_bit:
-
                 if common.last_int(out) & mask:
                     return out, constants.StatusCode.success
 
@@ -90,7 +87,6 @@ def write(self, data: bytes) -> Tuple[int, constants.StatusCode]:
             for val in common.iter_bytes(data, mask, send_end):
                 self.device.write(val)
         else:
-
             for i in range(len(data)):
                 self.device.write(data[i : i + 1])
 
diff --git a/pyvisa_sim/sessions/tcpip.py b/pyvisa_sim/sessions/tcpip.py
index ae42eab..b9fb231 100644
--- a/pyvisa_sim/sessions/tcpip.py
+++ b/pyvisa_sim/sessions/tcpip.py
@@ -59,7 +59,6 @@ def write(self, data: bytes) -> Tuple[int, constants.StatusCode]:
 
 @session.Session.register(constants.InterfaceType.tcpip, "INSTR")
 class TCPIPInstrumentSession(BaseTCPIPSession):
-
     parsed: rname.TCPIPInstr
 
     def after_parsing(self) -> None:
@@ -74,7 +73,6 @@ def after_parsing(self) -> None:
 
 @session.Session.register(constants.InterfaceType.tcpip, "SOCKET")
 class TCPIPSocketSession(BaseTCPIPSession):
-
     parsed: rname.TCPIPSocket
 
     def after_parsing(self) -> None:
diff --git a/pyvisa_sim/sessions/usb.py b/pyvisa_sim/sessions/usb.py
index 63674d6..8042b3b 100644
--- a/pyvisa_sim/sessions/usb.py
+++ b/pyvisa_sim/sessions/usb.py
@@ -75,7 +75,6 @@ def write(self, data: bytes) -> Tuple[int, constants.StatusCode]:
 
 @session.Session.register(constants.InterfaceType.usb, "RAW")
 class USBRawSession(session.Session):
-
     parsed: rname.USBRaw
 
     def after_parsing(self) -> None: