diff --git a/IT/ansible.md b/IT/ansible.md
index 9ad85a5..f55d79c 100644
--- a/IT/ansible.md
+++ b/IT/ansible.md
@@ -4,15 +4,15 @@
 
 ## commande ansible
 
-***launch playbook on staging***
-`ansible-playbook -i staging site.yml  --vault-password-file=.vaultpassword`
+**_launch playbook on staging_**
+`ansible-playbook -i staging site.yml --vault-password-file=.vaultpassword`
 
-***init new role architecture***
+**_init new role architecture_**
 `ansible-galaxy user_config init`
-***launch ansible bootstrap***
+**_launch ansible bootstrap_**
 `ansible-playbook -i nas, bootstrap.yml -u root --ask-pass`
 
-***encrypt string***
+**_encrypt string_**
 `ansible-vault encrypt_string`
 
 ## ignore know host file on ansible
@@ -21,3 +21,11 @@
 export ANSIBLE_HOST_KEY_CHECKING=False
 --ssh-extra-args='-o GlobalKnownHostsFile=/dev/null -o UserKnownHostsFile=/dev/null'
 ```
+
+## Merge Dict instead Replace
+
+in ansible config file set
+
+```
+hash_behaviour = merge
+```