diff --git a/singer_sdk/plugin_base.py b/singer_sdk/plugin_base.py
index 62f72f804..fcaa873b1 100644
--- a/singer_sdk/plugin_base.py
+++ b/singer_sdk/plugin_base.py
@@ -38,6 +38,11 @@
     extend_validator_with_defaults,
 )
 
+if sys.version_info >= (3, 11):
+    _LOG_LEVELS_MAPPING = logging.getLevelNamesMapping()
+else:
+    _LOG_LEVELS_MAPPING = logging._nameToLevel  # noqa: SLF001
+
 if t.TYPE_CHECKING:
     from jsonschema import ValidationError
 
@@ -137,7 +142,7 @@ def logger(cls) -> logging.Logger:  # noqa: N805
 
         logger = logging.getLogger(cls.name)
 
-        if log_level is not None and log_level.upper() in logging._levelToName.values():  # noqa: SLF001
+        if log_level is not None and log_level.upper() in _LOG_LEVELS_MAPPING:
             logger.setLevel(log_level.upper())
 
         return logger