diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index d0963b8..6056a97 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -39,7 +39,7 @@ repos:
       - id: pyupgrade
         args: [--py37-plus]
   - repo: https://github.com/PyCQA/isort
-    rev: 5.10.1
+    rev: 5.12.0
     hooks:
       - id: isort
   - repo: https://github.com/psf/black
diff --git a/src/led_ble/led_ble.py b/src/led_ble/led_ble.py
index 06e2e2e..02c695a 100644
--- a/src/led_ble/led_ble.py
+++ b/src/led_ble/led_ble.py
@@ -498,7 +498,13 @@ async def _execute_disconnect(self) -> None:
             self._read_char = None
             self._write_char = None
             if client and client.is_connected:
-                await client.stop_notify(read_char)
+                if read_char:
+                    try:
+                        await client.stop_notify(read_char)
+                    except BleakError:
+                        _LOGGER.debug(
+                            "%s: Failed to stop notifications", self.name, exc_info=True
+                        )
                 await client.disconnect()
 
     @retry_bluetooth_connection_error(DEFAULT_ATTEMPTS)