diff --git a/charts/dbp-moodle/README.md b/charts/dbp-moodle/README.md
index d0b57e1..31448bc 100644
--- a/charts/dbp-moodle/README.md
+++ b/charts/dbp-moodle/README.md
@@ -83,8 +83,10 @@ The Chart can be deployed without any modification but it is advised to set own
 | backup-cronjob.serviceAccount.create | bool | `false` |  |
 | backup-cronjob.serviceAccount.name | string | `"moodle-backup-job"` |  |
 | backup-cronjob.tolerations | list | `[]` |  |
-| dbpMoodle.backup | object | `{"cluster_name":"","enabled":false,"endpoint":"","gpg_key_names":"","gpgkeys":{"existingSecret":"","gpgkey.dbpinfra.pub.asc":"","gpgkey.dbpinfra.sec.asc":""},"rules":[{"apiGroups":["apps"],"resources":["deployments"],"verbs":["get","patch","list","watch"]},{"apiGroups":["batch"],"resources":["cronjobs","jobs"],"verbs":["get","patch"]}],"s3_bucket_name":"","secrets":{"existingSecret":"","s3_access_key":"","s3_access_secret":"","s3_endpoint_url":""}}` | Backup configuration. Set enabled=true to enable the backup-cronjob. Also set s3 location credentials |
+| dbpMoodle.backup | object | `{"cluster_name":"","enabled":false,"endpoint":"","gpg_key_names":"","gpgkeys":{"existingSecret":"","gpgkey.dbpinfra.pub.asc":"","gpgkey.dbpinfra.sec.asc":""},"max_full_backup_age":"1W","retention_time":"6M","rules":[{"apiGroups":["apps"],"resources":["deployments"],"verbs":["get","patch","list","watch"]},{"apiGroups":["batch"],"resources":["cronjobs","jobs"],"verbs":["get","patch"]}],"s3_bucket_name":"","secrets":{"existingSecret":"","s3_access_key":"","s3_access_secret":"","s3_endpoint_url":""}}` | Backup configuration. Set enabled=true to enable the backup-cronjob. Also set s3 location credentials |
 | dbpMoodle.backup.gpgkeys.existingSecret | string | `""` | Existing  secret for gpg keys |
+| dbpMoodle.backup.max_full_backup_age | string | `"1W"` | Defines the maximum age of a full backup before a new full backup is created. The backups in between are incremental |
+| dbpMoodle.backup.retention_time | string | `"6M"` | Defines the maximum age of a backup before it is deleted |
 | dbpMoodle.backup.secrets | object | `{"existingSecret":"","s3_access_key":"","s3_access_secret":"","s3_endpoint_url":""}` | Either provide an existing secret, or set each secret value here. If both are set the existingSecret is used |
 | dbpMoodle.backup.secrets.existingSecret | string | `""` | Existing secret for s3 endpoint |
 | dbpMoodle.debug | bool | `false` | Moodle debugging is not safe for production |
diff --git a/charts/dbp-moodle/templates/_helpers.tpl b/charts/dbp-moodle/templates/_helpers.tpl
index 323225a..a42a877 100644
--- a/charts/dbp-moodle/templates/_helpers.tpl
+++ b/charts/dbp-moodle/templates/_helpers.tpl
@@ -47,6 +47,14 @@
 {{- default "moodle" .Values.dbpMoodle.secrets.etherpad_api_key }}
 {{- end -}}
 
+{{- define "dbpMoodle.backup.retention_time" -}}
+{{- default "6M" .Values.dbpMoodle.backup.retention_time }}
+{{- end -}}
+
+{{- define "dbpMoodle.backup.max_full_backup_age" -}}
+{{- default "1W" .Values.dbpMoodle.backup.max_full_backup_age }}
+{{- end -}}
+
 {{- define "dbpMoodle.pluginConfigMap.content" -}}
 kaltura:kaltura:: {{- .Values.global.moodlePlugins.kaltura.enabled }}{{"\n"}}
 wunderbyte_table:local_wunderbyte_table:local/wunderbyte_table: {{- .Values.global.moodlePlugins.booking.enabled}}{{"\n"}}
diff --git a/charts/dbp-moodle/templates/configmaps/duply-configmap.yaml b/charts/dbp-moodle/templates/configmaps/duply-configmap.yaml
index 79b41c3..212bbc0 100644
--- a/charts/dbp-moodle/templates/configmaps/duply-configmap.yaml
+++ b/charts/dbp-moodle/templates/configmaps/duply-configmap.yaml
@@ -12,8 +12,8 @@ data:
     GPG="/usr/bin/gpg"
     TARGET="boto3+s3://{{ .Values.dbpMoodle.backup.s3_bucket_name }}/{{ .Values.dbpMoodle.backup.cluster_name }}/{{ .Release.Namespace }}/"
     SOURCE='/'
-    MAX_AGE=6M
-    MAX_FULLBKP_AGE=1W
+    MAX_AGE={{ include "dbpMoodle.backup.retention_time" . }}
+    MAX_FULLBKP_AGE={{ include "dbpMoodle.backup.max_full_backup_age" . }}
     DUPL_PARAMS="$DUPL_PARAMS --full-if-older-than $MAX_FULLBKP_AGE --allow-source-mismatch --s3-endpoint-url  {{ .Values.dbpMoodle.backup.endpoint }}"
   exclude: |-
     + /tmp/backup
diff --git a/charts/dbp-moodle/values.yaml b/charts/dbp-moodle/values.yaml
index 6a4d59d..7a9d5f2 100644
--- a/charts/dbp-moodle/values.yaml
+++ b/charts/dbp-moodle/values.yaml
@@ -122,6 +122,10 @@ dbpMoodle:
   # -- Backup configuration. Set enabled=true to enable the backup-cronjob. Also set s3 location credentials
   backup:
     enabled: false
+    # -- Defines the maximum age of a backup before it is deleted
+    retention_time: "6M"
+    # -- Defines the maximum age of a full backup before a new full backup is created. The backups in between are incremental
+    max_full_backup_age: "1W"
     gpg_key_names: ""
     gpgkeys:
       gpgkey.dbpinfra.pub.asc: ""