diff --git a/scripts/backup b/scripts/backup
index 58a7016..419c0d3 100644
--- a/scripts/backup
+++ b/scripts/backup
@@ -7,7 +7,7 @@ set -eu
 backup_dir=$1
 
 # The parameter $2 is theid of the app instance
-app=$2
+app=$YNH_APP_INSTANCE_NAME
 
 # Source app helpers
 source /usr/share/yunohost/helpers
diff --git a/scripts/restore b/scripts/restore
index a646aaa..daccfe9 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -8,7 +8,7 @@ set -eu
 backup_dir=$1
 
 # The parameter $2 is the id of the app instance ex: ynhexample__2
-app=$2
+app=$YNH_APP_INSTANCE_NAME
 
 # Source app helpers
 source /usr/share/yunohost/helpers
diff --git a/scripts/upgrade b/scripts/upgrade
index 554a594..0462912 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -33,8 +33,8 @@ db_name=$app
 CHECK_MD5_CONFIG "connect.php" "$final_path/config/connect.php"	# Created a backup of the config file if it was changed.
 
 # Modify Nginx configuration file and copy it to Nginx conf directory
-sed -i "s@PATHTOCHANGE@$path@g" ../conf/nginx.conf*
-sed -i "s@ALIASTOCHANGE@$final_path/@g" ../conf/nginx.conf*
+sed -i "s@__PATHTOCHANGE__@$app@g" ../conf/nginx.conf*
+sed -i "s@__FINALPATH__@$final_path/@g" ../conf/nginx.conf*
 
 if [ $is_public = "Yes" ];
 then