diff --git a/scripts/install b/scripts/install
index 53d2138..6f23bde 100644
--- a/scripts/install
+++ b/scripts/install
@@ -90,10 +90,6 @@ ynh_app_setting_set --app=$app --key=final_path --value=$final_path
 # Download, check integrity, uncompress and patch the source from app.src
 ynh_setup_source --dest_dir="$final_path"
 
-chmod 750 "$final_path"
-chmod -R o-rwx "$final_path"
-chown -R $app:$app "$final_path"
-
 #=================================================
 # NGINX CONFIGURATION
 #=================================================
@@ -130,6 +126,10 @@ pushd "$final_path"
 	ynh_exec_warn_less sudo -u $app env $ynh_node_load_PATH bower install --allow-root
 popd
 
+chmod 750 "$final_path"
+chmod -R o-rwx "$final_path"
+chown -R $app:$app "$final_path"
+
 #=================================================
 # SETUP LOGROTATE
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 1a70a51..397e090 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -123,10 +123,10 @@ ynh_exec_warn_less ynh_install_nodejs --nodejs_version=$nodejs_version
 ynh_script_progression --message="Building $app... (this will take some time and resources!)" --weight=60
 
 pushd "$final_path" 
-	ynh_exec_warn_less npm install --allow-root
-	ynh_exec_warn_less npm install -g bower
-	ynh_exec_warn_less bower update --allow-root
-	ynh_exec_warn_less npm i
+	ynh_exec_warn_less sudo -u $app env $ynh_node_load_PATH $ynh_npm install --allow-root
+	ynh_exec_warn_less sudo -u $app env $ynh_node_load_PATH $ynh_npm install -g bower
+	ynh_exec_warn_less sudo -u $app env $ynh_node_load_PATH bower update --allow-root
+	ynh_exec_warn_less sudo -u $app env $ynh_node_load_PATH $ynh_npm i
 popd
 
 #=================================================