diff --git a/main.sh b/main.sh
index abe77f2..30a4a34 100644
--- a/main.sh
+++ b/main.sh
@@ -42,3 +42,4 @@ rm "$lockfile"
 
 # delete old files
 find $destination -type f -mtime +40 -delete
+find $destination -type d -empty -delete