diff --git a/scripts/_common.sh b/scripts/_common.sh
index 8db757b..94a4ed2 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -59,7 +59,7 @@ install_dependance() {
 }
 
 set_permission() {
-    chown -R $YNH_APP_ID:$YNH_APP_ID $install_dir
+    chown -R $app:$app $install_dir
     chmod -R u+rwX,g-wx,o= $install_dir
     setfacl -m user:www-data:rX $install_dir
     setfacl -m user:www-data:rX $install_dir/seafile-server-$seafile_version
@@ -69,9 +69,9 @@ set_permission() {
     test -e $install_dir/seahub-data && setfacl -R -m user:www-data:rX $install_dir/seahub-data
 
     find $data_dir \(   \! -perm -o= \
-                     -o \! -user $YNH_APP_ID \
-                     -o \! -group $YNH_APP_ID \) \
-                   -exec chown $YNH_APP_ID:$YNH_APP_ID {} \; \
+                     -o \! -user $app \
+                     -o \! -group $app \) \
+                   -exec chown $app:$app {} \; \
                    -exec chmod o= {} \;
 }
 
diff --git a/scripts/install b/scripts/install
index e4f59c9..11cee59 100644
--- a/scripts/install
+++ b/scripts/install
@@ -57,7 +57,7 @@ set_permission
 ynh_replace_special_string --match_string 'seafile_config.seafile_dir = seafile_config.validate_seafile_dir(seafile_dir)' \
                            --replace_string 'seafile_config.seafile_dir = seafile_dir' \
                            --target_file $install_dir/seafile-server-$seafile_version/setup-seafile-mysql.py
-sudo -u $YNH_APP_ID bash $install_dir/seafile-server-$seafile_version/setup-seafile-mysql.sh auto \
+sudo -u $app bash $install_dir/seafile-server-$seafile_version/setup-seafile-mysql.sh auto \
     --server-name "$server_name" \
     --server-ip $domain \
     --fileserver-port $port_fileserver \
diff --git a/scripts/upgrade b/scripts/upgrade
index 082aa56..d8cac23 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -109,12 +109,12 @@ case $installed_version in
 "7.0"* )
     # Fix file comment
     pushd $install_dir/seafile-server-$seafile_version
-    sudo -u $YNH_APP_ID $install_dir/seafile-server-$seafile_version/seahub.sh python-env python3 seahub/manage.py migrate_file_comment
+    sudo -u $app $install_dir/seafile-server-$seafile_version/seahub.sh python-env python3 seahub/manage.py migrate_file_comment
     popd
 
     # Update seafile by script
     ynh_replace_string --match_string='read dummy' --replace_string='# patched' --target_file=$install_dir/seafile-server-$seafile_version/upgrade/upgrade_7.0_7.1.sh
-    sudo -u $YNH_APP_ID bash $install_dir/seafile-server-$seafile_version/upgrade/upgrade_7.0_7.1.sh
+    sudo -u $app bash $install_dir/seafile-server-$seafile_version/upgrade/upgrade_7.0_7.1.sh
 
     # Fix seafile data link. Look like that the upgrade script of seafile don't always work correctly
     if [ -e $install_dir/seafile-data ]; then
@@ -125,16 +125,16 @@ case $installed_version in
 ;&
 "7.1."* )
     ynh_replace_string --match_string='read dummy' --replace_string='# patched' --target_file=$install_dir/seafile-server-$seafile_version/upgrade/upgrade_8.0_9.0.sh
-    sudo -u $YNH_APP_ID bash $install_dir/seafile-server-$seafile_version/upgrade/upgrade_8.0_9.0.sh
+    sudo -u $app bash $install_dir/seafile-server-$seafile_version/upgrade/upgrade_8.0_9.0.sh
 ;&
 "8.0."* )
     ynh_replace_string --match_string='read dummy' --replace_string='# patched' --target_file=$install_dir/seafile-server-$seafile_version/upgrade/upgrade_7.1_8.0.sh
-    sudo -u $YNH_APP_ID bash $install_dir/seafile-server-$seafile_version/upgrade/upgrade_7.1_8.0.sh
+    sudo -u $app bash $install_dir/seafile-server-$seafile_version/upgrade/upgrade_7.1_8.0.sh
 ;&
 esac
 
 ynh_replace_string --match_string='read dummy' --replace_string='# patched' --target_file=$install_dir/seafile-server-$seafile_version/upgrade/minor-upgrade.sh
-sudo -u $YNH_APP_ID bash $install_dir/seafile-server-$seafile_version/upgrade/minor-upgrade.sh
+sudo -u $app bash $install_dir/seafile-server-$seafile_version/upgrade/minor-upgrade.sh
 
 # Clean url in config in DB
 clean_url_in_db_config