diff --git a/README.md b/README.md
index 0117793..4adf64c 100644
--- a/README.md
+++ b/README.md
@@ -118,15 +118,14 @@ Generate the metric file for the first time:
 /srv/statoolinfos/bin/statoolinfos probe -full /srv/statoolinfos/conf/foo.bar.org.conf
 ```
 
-Create a cron file to update the metric file everyday:
-
+Create a cron file in `/etc/cron.d/statoolinfos` to update the metric file everyday:
 ```
-1 * * * * root /srv/statoolinfos/bin/statoolinfos probe -previousday /srv/statoolinfos/conf/foo.bar.org.conf >> /srv/statoolinfos/cron.log
+1 0,12 * * * root /srv/statoolinfos/bin/statoolinfos probe -previousday /srv/statoolinfos/conf/foo.bar.org.conf >> /srv/statoolinfos/cron.log
 ```
 
 In case of several configuration files, just set the configuration directory (without wildcard):
 ```
-1 * * * * root /srv/statoolinfos/bin/statoolinfos probe -previousday /srv/statoolinfos/conf/ >> /srv/statoolinfos/cron.log
+1 0,12 * * * root /srv/statoolinfos/bin/statoolinfos probe -previousday /srv/statoolinfos/conf/ >> /srv/statoolinfos/cron.log
 ```
 
 Warning: in previous day mode, the metrics generated are overwrited for the last month, the last week and the last day. So, six weeks in logs are required.