diff --git a/scripts/config b/scripts/config
index 3d3d113..ccfd85c 100644
--- a/scripts/config
+++ b/scripts/config
@@ -114,13 +114,13 @@ apply_config() {
     ynh_replace_string --match_string __DOMAIN__ --replace_string $domain --target_file "$homeserver_config_path"
     ynh_replace_string --match_string __SERVER_NAME__ --replace_string $server_name --target_file "$homeserver_config_path"   
     ynh_replace_string --match_string __SYNAPSE_DB_USER__ --replace_string $synapse_db_user --target_file "$homeserver_config_path"
-    ynh_replace_string --match_string __SYNAPSE_DB_PWD__ --replace_string $synapse_db_pwd --target_file "$homeserver_config_path"
+    ynh_replace_special_string --match_string __SYNAPSE_DB_PWD__ --replace_string $synapse_db_pwd --target_file "$homeserver_config_path"
     ynh_replace_string --match_string __PORT__ --replace_string $port --target_file "$homeserver_config_path"
     ynh_replace_string --match_string __TLS_PORT__ --replace_string $synapse_tls_port --target_file "$homeserver_config_path"
     ynh_replace_string --match_string __TURNSERVER_TLS_PORT__ --replace_string $turnserver_tls_port --target_file "$homeserver_config_path"
-    ynh_replace_string --match_string __TURNPWD__ --replace_string $turnserver_pwd --target_file "$homeserver_config_path"
-    ynh_replace_string --match_string __REGISTRATION_SECRET__ --replace_string "$registration_shared_secret" --target_file "$homeserver_config_path"
-    ynh_replace_string --match_string __FORM_SECRET__ --replace_string "$form_secret" --target_file "$homeserver_config_path"
+    ynh_replace_special_string --match_string __TURNPWD__ --replace_string $turnserver_pwd --target_file "$homeserver_config_path"
+    ynh_replace_special_string --match_string __REGISTRATION_SECRET__ --replace_string "$registration_shared_secret" --target_file "$homeserver_config_path"
+    ynh_replace_special_string --match_string __FORM_SECRET__ --replace_string "$form_secret" --target_file "$homeserver_config_path"
     ynh_replace_string --match_string __REPORT_STATS__ --replace_string "$report_stats" --target_file "$homeserver_config_path"
     ynh_replace_string --match_string=__ALLOW_PUBLIC_ROOMS__ --replace_string="$allow_public_rooms" --target_file="$homeserver_config_path"
     if [ -n $macaroon_secret_key ]; then
@@ -130,7 +130,7 @@ apply_config() {
         # For more detail about this issue you can see : https://matrix.org/blog/2019/01/15/further-details-on-critical-security-update-in-synapse-affecting-all-versions-prior-to-0-34-1-cve-2019-5885/
         ynh_replace_string --match_string='macaroon_secret_key: "__MACAROON_SECRET_KEY__"' --replace_string='# macaroon_secret_key: "__MACAROON_SECRET_KEY__"' --target_file="$homeserver_config_path"
     else
-        ynh_replace_string --match_string=__MACAROON_SECRET_KEY__ --replace_string="$macaroon_secret_key" --target_file="$homeserver_config_path"
+        ynh_replace_special_string --match_string=__MACAROON_SECRET_KEY__ --replace_string="$macaroon_secret_key" --target_file="$homeserver_config_path"
     fi
 
     if [ "$is_public" = "0" ]
diff --git a/scripts/install b/scripts/install
index f11091a..659a9da 100644
--- a/scripts/install
+++ b/scripts/install
@@ -280,11 +280,11 @@ ynh_replace_string --match_string=__TURNSERVER_TLS_PORT__ --replace_string=$turn
 ynh_replace_string --match_string=__REPORT_STATS__ --replace_string="$report_stats" --target_file="$homeserver_config_path"
 ynh_replace_string --match_string=__ALLOW_PUBLIC_ROOMS__ --replace_string="$allow_public_rooms" --target_file="$homeserver_config_path"
 ynh_print_OFF
-ynh_replace_string --match_string=__SYNAPSE_DB_PWD__ --replace_string=$synapse_db_pwd --target_file="$homeserver_config_path"
+ynh_replace_special_string --match_string=__SYNAPSE_DB_PWD__ --replace_string=$synapse_db_pwd --target_file="$homeserver_config_path"
 ynh_replace_special_string --match_string=__TURNPWD__ --replace_string=$turnserver_pwd --target_file="$homeserver_config_path"
 ynh_replace_special_string --match_string=__REGISTRATION_SECRET__ --replace_string="$registration_shared_secret" --target_file="$homeserver_config_path"
-ynh_replace_string --match_string=__FORM_SECRET__ --replace_string="$form_secret" --target_file="$homeserver_config_path"
-ynh_replace_string --match_string=__MACAROON_SECRET_KEY__ --replace_string="$macaroon_secret_key" --target_file="$homeserver_config_path"
+ynh_replace_special_string --match_string=__FORM_SECRET__ --replace_string="$form_secret" --target_file="$homeserver_config_path"
+ynh_replace_special_string --match_string=__MACAROON_SECRET_KEY__ --replace_string="$macaroon_secret_key" --target_file="$homeserver_config_path"
 ynh_print_ON
 
 ynh_replace_string --match_string=__APP__ --replace_string=$app --target_file="/etc/matrix-$app/log.yaml"
diff --git a/scripts/upgrade b/scripts/upgrade
index e05b3b4..7b70f47 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -209,18 +209,18 @@ ynh_replace_string --match_string=__TURNSERVER_TLS_PORT__ --replace_string=$turn
 ynh_replace_string --match_string=__REPORT_STATS__ --replace_string="$report_stats" --target_file="$homeserver_config_path"
 ynh_replace_string --match_string=__ALLOW_PUBLIC_ROOMS__ --replace_string="$allow_public_rooms" --target_file="$homeserver_config_path"
 ynh_print_OFF
-ynh_replace_string --match_string=__SYNAPSE_DB_PWD__ --replace_string=$synapse_db_pwd --target_file="$homeserver_config_path"
+ynh_replace_special_string --match_string=__SYNAPSE_DB_PWD__ --replace_string=$synapse_db_pwd --target_file="$homeserver_config_path"
 ynh_replace_special_string --match_string=__TURNPWD__ --replace_string=$turnserver_pwd --target_file="$homeserver_config_path"
 ynh_replace_special_string --match_string=__REGISTRATION_SECRET__ --replace_string="$registration_shared_secret" --target_file="$homeserver_config_path"
-ynh_replace_string --match_string=__FORM_SECRET__ --replace_string="$form_secret" --target_file="$homeserver_config_path"
+ynh_replace_special_string --match_string=__FORM_SECRET__ --replace_string="$form_secret" --target_file="$homeserver_config_path"
 if [ -n $macaroon_secret_key ]; then
     # Well, in this package this value was not managed because it was not needed, synapse is able to generate this with some other secret in the config file but after some vulnerability was found with this practice.
     # For more detail about this issue you can see : https://matrix.org/blog/2019/01/15/further-details-on-critical-security-update-in-synapse-affecting-all-versions-prior-to-0-34-1-cve-2019-5885/
     # The problem is that we can't just say generate a new value if the package has not already defined a value. The reason is that changing this value logout all user. And in case of a user has enabled the encryption, the user might lost all conversation !!
     # So for the old install we just leave this as it is. And for the new install we use a real macaroon.
-    ynh_replace_string --match_string='macaroon_secret_key: "__MACAROON_SECRET_KEY__"' --replace_string='# macaroon_secret_key: "__MACAROON_SECRET_KEY__"' --target_file="$homeserver_config_path"
+    ynh_replace_special_string --match_string='macaroon_secret_key: "__MACAROON_SECRET_KEY__"' --replace_string='# macaroon_secret_key: "__MACAROON_SECRET_KEY__"' --target_file="$homeserver_config_path"
 else
-    ynh_replace_string --match_string=__MACAROON_SECRET_KEY__ --replace_string="$macaroon_secret_key" --target_file="$homeserver_config_path"
+    ynh_replace_special_string --match_string=__MACAROON_SECRET_KEY__ --replace_string="$macaroon_secret_key" --target_file="$homeserver_config_path"
 fi
 ynh_print_ON