diff --git a/doc/PRODUCTION.md b/doc/PRODUCTION.md
index 45b3066..358b14b 100644
--- a/doc/PRODUCTION.md
+++ b/doc/PRODUCTION.md
@@ -133,24 +133,40 @@ CAUTION, this will delete user's home, it's irrevocable.
 
 # Update ip when public ip change with CloudFlare and crontab
 
+First you need a valid python3 interpreter running with cloudflare module installed: (make sure your pip3 pointing the right python3)
+
+```bash
+pip3 install cloudflare==2.20.0
+```
+
+Then you need to create the cfg files with credentials for your cloudflare account.
+
 ```bash
 mkdir ~/.cloudflare
 ```
-
 Edit ~/.cloudflare/cloudflare.cfg
 
 ```
 [PROFILE_NAME]
 email=EMAIL
-token=TOKEN
+token=TOKEN (Use the global API key so that it works)
 ```
 
-Add your cron
+Add your cron and specify the python3 you want to use with it.
+- USER is the local user with permissions to execute the script
+- PATH is path to inside of ERPLibre/deployment/ folder
+- PROFILE_NAME must match the PROFILE_NAME in cloudflare.cfg
+- CLOUDFLARE_ZONE_NAME is the name of the website zone on cloudflare
+- DNS_NAME is the name of one DNS A record name available on that zone
+
+Notes:
+- Only one crontab is required because the script will automatically research all available zones with outdated ip and update them on all A records.
+- For each crontab run, if public IP did not change compared to what is on cloudflare, the script will not do unnecessary changes and let everything as is.
 
 ```bash
 vim /etc/crontab
 # Add
-*/5 * * * * USER cd PATH && ./script/deployment/update_dns_cloudflare.py --profile PROFILE_NAME --zone_name CLOUDFLARE_ZONE_NAME --dns_name DNS_NAME --auto_sync
+*/5 * * * * USER cd PATH && python3 script/deployment/update_dns_cloudflare.py --profile PROFILE_NAME --zone_name CLOUDFLARE_ZONE_NAME --dns_name DNS_NAME --auto_sync
 ```
 
 Check log with
@@ -159,6 +175,21 @@ Check log with
 sudo journalctl -feu cron
 ```
 
+If you want to log what is happening and when the script is run, like logging when ip changes, you can add a logging part to your cron
+
+```bash
+vim /etc/crontab
+# Add
+*/5 * * * * USER cd PATH && python3 script/deployment/update_dns_cloudflare.py --profile PROFILE_NAME --zone_name CLOUDFLARE_ZONE_NAME --dns_name DNS_NAME --auto_sync > /home/USER/logs/update_dns_ZONE_NAME.log 2>&1
+
+```
+
+You can then read all logs with this command (Need to have ts installed: sudo apt install moreutils)
+
+```bash
+tail -f /home/USER/logs/update_dns_ZONE_NAME.log | ts
+```
+
 # Docker
 
 ## Update
diff --git a/script/deployment/update_dns_cloudflare.py b/script/deployment/update_dns_cloudflare.py
index be21e71..1263b90 100755
--- a/script/deployment/update_dns_cloudflare.py
+++ b/script/deployment/update_dns_cloudflare.py
@@ -27,17 +27,19 @@ def get_config():
         Can update all old_ip to new_ip.
         When auto_sync is enable:
         Check zone and name on cloudflare and compare with public ip, update all old ip with new ip if different.
-        You need your profile in file ~/.cloudflare/cloudflare.cfg
+        1-you need a valid python3 interpreter running with cloudflare module installed:
+            pip3 install cloudflare==2.20.0
+        2-You need your profile in file ~/.cloudflare/cloudflare.cfg
         Example:
-        [profil_name]
-        email=email@email.com
-        token=TOKEN
+            [profil_name]
+            email=email@email.com
+            token=TOKEN (Use the global API key so that it works)
 
         Configure locally a crontab and adapt it, crontab -e, specify an existing DNS
         Example each 5 minutes:
-        */5 * * * * USERNAME cd /home/USERNAME/ERPLibre && ./script/deployment/update_dns_cloudflare.py --profile profil_name --zone_name example.com --dns_name example.com --auto_sync
+        */5 * * * * USERNAME cd /home/USERNAME/ERPLibre && python3 script/deployment/update_dns_cloudflare.py --profile profil_name --zone_name example.com --dns_name example.com --auto_sync
         Example each minute:
-        * * * * * USERNAME cd /home/USERNAME/ERPLibre && ./script/deployment/update_dns_cloudflare.py --profile profil_name --zone_name example.com --dns_name example.com --auto_sync
+        * * * * * USERNAME cd /home/USERNAME/ERPLibre && python3 script/deployment/update_dns_cloudflare.py --profile profil_name --zone_name example.com --dns_name example.com --auto_sync
 """,
         epilog="""\
 """,