diff --git a/src/pythonjsonlogger/jsonlogger.py b/src/pythonjsonlogger/jsonlogger.py
index 519a64d..b14506b 100644
--- a/src/pythonjsonlogger/jsonlogger.py
+++ b/src/pythonjsonlogger/jsonlogger.py
@@ -39,6 +39,7 @@
     "stack_info",
     "thread",
     "threadName",
+    "taskName",
 )
 
 OptionalCallableOrStr = Optional[Union[Callable, str]]