--- a/mbed_lstools/platform_database.py
+++ b/mbed_lstools/platform_database.py
@@ -25,7 +25,7 @@
 from io import open
 from os import makedirs
 from os.path import join, dirname, getmtime
-from appdirs import user_data_dir
+from platformdirs import user_data_dir
 from fasteners import InterProcessLock
 
 try: