diff --git a/backup/backup.sh b/backup/backup.sh
index cba27ee..896eb39 100755
--- a/backup/backup.sh
+++ b/backup/backup.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 # array of available collection names
-col=(app_user awarding decoration rank squad user)
+col=(app_user awarding decoration rank squad user promotion)
 
 for i in "${col[@]}"
 do