diff --git a/src/pythonjsonlogger/jsonlogger.py b/src/pythonjsonlogger/jsonlogger.py
index 519a64d..291b2bc 100644
--- a/src/pythonjsonlogger/jsonlogger.py
+++ b/src/pythonjsonlogger/jsonlogger.py
@@ -3,8 +3,8 @@
 to output log data as JSON formatted strings
 """
 import logging
-import json
 import re
+import sys
 import traceback
 import importlib
 from datetime import date, datetime, time, timezone
@@ -41,6 +41,12 @@
     "threadName",
 )
 
+if sys.version_info >= (3, 12):
+    RESERVED_ATTRS = (
+        *RESERVED_ATTRS,
+        "taskName",
+    )
+
 OptionalCallableOrStr = Optional[Union[Callable, str]]