diff --git a/mylib/config.py b/mylib/config.py
index 94c3293..f2acf42 100644
--- a/mylib/config.py
+++ b/mylib/config.py
@@ -864,7 +864,9 @@ class Config:  # pylint: disable=too-many-instance-attributes
             comment=(
                 "File log level limit : by default, all logged messages (according to main log "
                 "level) will be logged to the log file, but you can set a minimal level if you "
-                f"want. Possible values: {', '.join(logging.getLevelNamesMapping())}."
+                # logging.getLevelNamesMapping() not available in python 3.9
+                # pylint: disable=protected-access
+                f"want. Possible values: {', '.join(logging._nameToLevel)}."
             ),
         )
 
@@ -968,7 +970,9 @@ class Config:  # pylint: disable=too-many-instance-attributes
         if self.get("logfile", "path"):
             logfile_handler = logging.FileHandler(self.get("logfile", "path"))
             logfile_level = (
-                logging.getLevelNamesMapping().get(self.get("logfile", "level"))
+                # logging.getLevelNamesMapping() not available in python 3.9
+                # pylint: disable=protected-access
+                logging._nameToLevel.get(self.get("logfile", "level"))
                 if self.get("logfile", "level")
                 else logging.DEBUG
             )