diff --git a/scripts/_common.sh b/scripts/_common.sh
index 9df33ff..b4fac04 100755
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -6,7 +6,10 @@
 
 YNH_PHP_VERSION="8.1"
 
-pkg_dependencies="postgresql php${YNH_PHP_VERSION}-apcu php${YNH_PHP_VERSION}-fpm php${YNH_PHP_VERSION}-pgsql php${YNH_PHP_VERSION}-gd php${YNH_PHP_VERSION}-common php${YNH_PHP_VERSION}-curl php${YNH_PHP_VERSION}-intl php${YNH_PHP_VERSION}-gmp php${YNH_PHP_VERSION}-xml php${YNH_PHP_VERSION}-json"
+php_dependencies="php${YNH_PHP_VERSION}-apcu php${YNH_PHP_VERSION}-fpm php${YNH_PHP_VERSION}-pgsql php${YNH_PHP_VERSION}-gd php${YNH_PHP_VERSION}-common php${YNH_PHP_VERSION}-curl php${YNH_PHP_VERSION}-intl php${YNH_PHP_VERSION}-gmp php${YNH_PHP_VERSION}-xml php${YNH_PHP_VERSION}-json"
+
+# dependencies used by the app (must be on a single line)
+pkg_dependencies="postgresql $php_dependencies"
 
 #=================================================
 # PERSONAL HELPERS
diff --git a/scripts/install b/scripts/install
index 4194e6f..39751ac 100755
--- a/scripts/install
+++ b/scripts/install
@@ -55,7 +55,7 @@ ynh_app_setting_set --app=$app --key=path --value=$path_url
 #=================================================
 ynh_script_progression --message="Installing dependencies..." --weight=3
 
-ynh_install_app_dependencies $pkg_dependencies
+ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies
 
 #=================================================
 # CREATE DEDICATED USER
diff --git a/scripts/restore b/scripts/restore
index 77ca61d..2899b53 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -71,7 +71,7 @@ chown -R $app:www-data "$final_path"
 ynh_script_progression --message="Reinstalling dependencies..." --weight=1
 
 # Define and install dependencies
-ynh_install_app_dependencies $pkg_dependencies
+ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies
 
 #=================================================
 # RESTORE THE PHP-FPM CONFIGURATION
diff --git a/scripts/upgrade b/scripts/upgrade
index c9957e8..a1b8c9d 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -70,7 +70,7 @@ chown -R $app:www-data "$final_path"
 #=================================================
 ynh_script_progression --message="Upgrading dependencies..." --weight=5
 
-ynh_install_app_dependencies $pkg_dependencies
+ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies
 
 #=================================================
 # PHP-FPM CONFIGURATION