diff --git a/.env.example b/.env.example
index 3bfee7bf24..fe6ff8a8a0 100644
--- a/.env.example
+++ b/.env.example
@@ -80,6 +80,12 @@ MAIL_BACKUP_NOTIFICATION_ADDRESS=null
 BACKUP_ENV=true
 ALLOW_BACKUP_DELETE=false
 ALLOW_DATA_PURGE=false
+ALL_BACKUP_KEEP_DAYS=7
+DAILY_BACKUP_KEEP_DAYS=16
+WEEKLY_BACKUP_KEEP_WEEKS=8
+MONTHLY_BACKUP_KEEP_MONTHS=4
+YEARLY_BACKUP_KEEP_YEARS=2
+BACKUP_PURGE_OLDEST_AT_MEGS=5000
 
 # --------------------------------------------
 # OPTIONAL: SESSION SETTINGS
diff --git a/config/backup.php b/config/backup.php
index 0890877339..5641134be8 100644
--- a/config/backup.php
+++ b/config/backup.php
@@ -207,33 +207,33 @@ return [
             /*
              * The number of days for which backups must be kept.
              */
-            'keep_all_backups_for_days' => 7,
+            'keep_all_backups_for_days' => env('ALL_BACKUP_KEEP_DAYS', 7),
 
             /*
              * The number of days for which daily backups must be kept.
              */
-            'keep_daily_backups_for_days' => 16,
+            'keep_daily_backups_for_days' => env('DAILY_BACKUP_KEEP_DAYS', 16),
 
             /*
              * The number of weeks for which one weekly backup must be kept.
              */
-            'keep_weekly_backups_for_weeks' => 8,
+            'keep_weekly_backups_for_weeks' => env('WEEKLY_BACKUP_KEEP_WEEKS', 8),
 
             /*
              * The number of months for which one monthly backup must be kept.
              */
-            'keep_monthly_backups_for_months' => 4,
+            'keep_monthly_backups_for_months' => env('MONTHLY_BACKUP_KEEP_MONTHS', 4),
 
             /*
              * The number of years for which one yearly backup must be kept.
              */
-            'keep_yearly_backups_for_years' => 2,
+            'keep_yearly_backups_for_years' => env('YEARLY_BACKUP_KEEP_YEARS', 2),
 
             /*
              * After cleaning up the backups remove the oldest backup until
              * this amount of megabytes has been reached.
              */
-            'delete_oldest_backups_when_using_more_megabytes_than' => 5000,
+            'delete_oldest_backups_when_using_more_megabytes_than' => env('BACKUP_PURGE_OLDEST_AT_MEGS', 5000),
         ],
     ],