diff --git a/picframe/image_cache.py b/picframe/image_cache.py
index ee3db12..b640c85 100644
--- a/picframe/image_cache.py
+++ b/picframe/image_cache.py
@@ -356,6 +356,7 @@ def __get_modified_folders(self):
         out_of_date_folders = []
         sql_select = "SELECT * FROM folder WHERE name = ?"
         for dir in [d[0] for d in os.walk(self.__picture_dir, followlinks=self.__follow_links)]:
+            if os.path.basename(dir)[0] == '.': continue # ignore hidden folders
             mod_tm = int(os.stat(dir).st_mtime)
             found = self.__db.execute(sql_select, (dir,)).fetchone()
             if not found or found['last_modified'] < mod_tm or found['missing'] == 1: