diff --git a/scripts/upgrade b/scripts/upgrade
index 2e91083..4a613d0 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -41,12 +41,12 @@ ynh_systemd_action --service_name=$app --action="stop" --log_path="/var/log/$app
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
 
-if [ "$upgrade_type" == "UPGRADE_APP" ]
-then
+if [ $(ynh_compare_current_package_version --comparison le --version 2.6.2~ynh4) ]; then
+	rm -rf "$install_dir/{*,.*}"
+fi
+
+if [[ "$upgrade_type" == "UPGRADE_APP" || $(ynh_compare_current_package_version --comparison le --version 2.6.2~ynh4) ]]; then
 	ynh_script_progression --message="Upgrading source files..." --weight=5
-
-	ynh_secure_remove --file="$install_dir/release"
-
 	# Download, check integrity, uncompress and patch the source from app.src
 	ynh_setup_source --dest_dir="$install_dir/build" --full_replace=1 #--keep=".env"
 fi
@@ -92,13 +92,40 @@ ynh_psql_execute_as_root --sql="CREATE EXTENSION IF NOT EXISTS pgcrypto;" --data
 #=================================================
 # CONFIGURE THE APP
 #=================================================
-ynh_script_progression --message="Configuring the app..." --weight=15
+if [[ "$upgrade_type" == "UPGRADE_APP" || $(ynh_compare_current_package_version --comparison le --version 2.6.2~ynh4) ]]; then
+	ynh_script_progression --message="Configuring the app..." --weight=15
+
+	pushd $install_dir
+		ynh_use_nodejs
+		ynh_exec_warn_less ynh_exec_as $app env $ynh_node_load_PATH yarn install
+		ynh_exec_warn_less ynh_exec_as $app env $ynh_node_load_PATH NEXT_TELEMETRY_DISABLED=1 yarn build
+
+		# Actual app is a subset of release assets
+		# List of deps based on Dockerfile: https://github.com/umami-software/umami/blob/master/Dockerfile
+		ynh_secure_remove --file="node_modules/"
+		mv next.config.js .next/standalone/
+		mv public .next/standalone/
+		mv prisma .next/standalone/
+		mv scripts .next/standalone/
+		mv .next/static .next/standalone/.next
+	popd
+
+	ynh_secure_remove --file="$install_dir/release"
+
+	mkdir "$install_dir/release"
+	chmod -R o-rwx "$install_dir/release"
+	chown -R $app:www-data "$install_dir/release"
+
+	mv -f $install_dir/build/.next/standalone/* $install_dir/build/.next/standalone/.[!.]* $install_dir/release
+
+	pushd "$install_dir/release"
+		ynh_exec_warn_less ynh_exec_as $app env $ynh_node_load_PATH yarn add npm-run-all dotenv prisma
+	popd
+fi
+
+rm -rf $install_dir/.cache
+rm -rf $install_dir/build
 
-pushd $install_dir
-	ynh_use_nodejs
-	ynh_exec_warn_less ynh_exec_as $app env $ynh_node_load_PATH yarn install
-	ynh_exec_warn_less ynh_exec_as $app env $ynh_node_load_PATH NEXT_TELEMETRY_DISABLED=1 yarn build
-popd
 
 #=================================================
 # START SYSTEMD SERVICE