diff --git a/scripts/install b/scripts/install
index 51523cc..745a2af 100644
--- a/scripts/install
+++ b/scripts/install
@@ -60,7 +60,7 @@ ynh_script_progression --message="Installing dependencies..." --weight=20
 
 if [ $database == "pgsql" ]
 then
-	pkg_dependencies="$pkg_dependencies pgsql_pkg_dependencies"
+	pkg_dependencies="$pkg_dependencies $pgsql_pkg_dependencies"
 fi
 
 ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies
diff --git a/scripts/restore b/scripts/restore
index 5190e54..7bb5590 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -84,6 +84,11 @@ phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)
 ynh_script_progression --message="Reinstalling dependencies..." --weight=6
 
 # Define and install dependencies
+if [ $database == "pgsql" ]
+then
+	pkg_dependencies="$pkg_dependencies $pgsql_pkg_dependencies"
+fi
+
 ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies
 
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 2e9c46c..e7ab777 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -127,7 +127,12 @@ ynh_add_nginx_config
 #=================================================
 ynh_script_progression --message="Upgrading dependencies..." --weight=1
 
-ynh_install_app_dependencies $pkg_dependencies
+if [ $database == "pgsql" ]
+then
+	pkg_dependencies="$pkg_dependencies $pgsql_pkg_dependencies"
+fi
+
+ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies
 
 #=================================================
 # PHP-FPM CONFIGURATION