diff --git a/README.rst b/README.rst
index de5a105..9cdf64a 100644
--- a/README.rst
+++ b/README.rst
@@ -722,7 +722,7 @@
         full_backups_to_keep: 3
         incr_before_full: 3
         backup_times:
-          dayOfWeek: 0
+          day_of_week: 0
           hour: 4
           minute: 52
         compression: true
@@ -739,7 +739,7 @@
   ``backup_times`` parameters is not defined, the defalut ``*`` value will be
   used. For example, if minute parameter is ``*``, it will run the backup every minute,
   which is ususally not desired.
-  Available parameters are ``dayOfWeek``, ``dayOfMonth``, ``month``, ``hour`` and ``minute``.
+  Available parameters are ``day_of_week``, ``day_of_month``, ``month``, ``hour`` and ``minute``.
   Please see the crontab reference for further info on how to set these parameters.
 
   .. note:: Please be aware that only ``backup_times`` section OR
@@ -785,7 +785,7 @@
         incr_before_full: 3
         backup_dir: /srv/backup
         backup_times:
-          dayOfWeek: 0
+          day_of_week: 0
           hour: 4
           minute: 52
         key:
@@ -799,7 +799,7 @@
   ``backup_times`` parameters is not defined, the defalut ``*`` value will be
   used. For example, if minute parameter is ``*``, it will run the backup every minute,
   which is ususally not desired.
-  Available parameters are ``dayOfWeek``, ``dayOfMonth``, ``month``, ``hour`` and ``minute``.
+  Available parameters are ``day_of_week``, ``day_of_month``, ``month``, ``hour`` and ``minute``.
   Please see the crontab reference for further info on how to set these parameters.
 
   .. note:: Please be aware that only ``backup_times`` section OR
diff --git a/ceph/backup.sls b/ceph/backup.sls
index c35fe1d..e590490 100644
--- a/ceph/backup.sls
+++ b/ceph/backup.sls
@@ -40,14 +40,14 @@
   - name: /usr/local/bin/ceph-backup-runner-call.sh
   - user: root
 {%- if backup.client.backup_times is defined %}
-{%- if backup.client.backup_times.dayOfWeek is defined %}
-  - dayweek: {{ backup.client.backup_times.dayOfWeek }}
+{%- if backup.client.backup_times.day_of_week is defined %}
+  - dayweek: {{ backup.client.backup_times.day_of_week }}
 {%- endif -%}
 {%- if backup.client.backup_times.month is defined %}
   - month: {{ backup.client.backup_times.month }}
 {%- endif %}
-{%- if backup.client.backup_times.dayOfMonth is defined %}
-  - daymonth: {{ backup.client.backup_times.dayOfMonth }}
+{%- if backup.client.backup_times.day_of_month is defined %}
+  - daymonth: {{ backup.client.backup_times.day_of_month }}
 {%- endif %}
 {%- if backup.client.backup_times.hour is defined %}
   - hour: {{ backup.client.backup_times.hour }}
@@ -140,14 +140,14 @@
   - name: /usr/local/bin/ceph-backup-runner.sh
   - user: ceph
 {%- if backup.server.backup_times is defined %}
-{%- if backup.server.backup_times.dayOfWeek is defined %}
-  - dayweek: {{ backup.server.backup_times.dayOfWeek }}
+{%- if backup.server.backup_times.day_of_week is defined %}
+  - dayweek: {{ backup.server.backup_times.day_of_week }}
 {%- endif -%}
 {%- if backup.server.backup_times.month is defined %}
   - month: {{ backup.server.backup_times.month }}
 {%- endif %}
-{%- if backup.server.backup_times.dayOfMonth is defined %}
-  - daymonth: {{ backup.server.backup_times.dayOfMonth }}
+{%- if backup.server.backup_times.day_of_month is defined %}
+  - daymonth: {{ backup.server.backup_times.day_of_month }}
 {%- endif %}
 {%- if backup.server.backup_times.hour is defined %}
   - hour: {{ backup.server.backup_times.hour }}