diff --git a/scripts/upgrade b/scripts/upgrade
index ed6a3aa..2ca6144 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -80,14 +80,26 @@ ynh_install_php7
 version=`cd /var/www/$app && bin/console kimai:version --short 2> /dev/null || sed -n 's/^future-release=//p' .github_changelog_generator`
 
 # Uncompress latest sources
+# Create a temporary directory
+tmpdir="$(mktemp -d)"
+# Backup the config file in the temp dir
+cp -a "$final_path/.env" "$tmpdir/."
+cp -a "$final_path/var/data" "$tmpdir/."
+
 ynh_setup_source "$final_path"
 
 # If the version is 0.3, symfony update is required
 if [ "$version" = "0.3" ]
 then
+    ynh_secure_remove "$final_path"
+    ynh_setup_source "$final_path"
 	init_symfony_update $final_path
 fi
-
+ynh_secure_remove "$final_path"
+ynh_setup_source  "$final_path"
+sudo cp -a "$tmpdir/.env" "$final_path/."
+sudo cp -af "$tmpdir/data" "$final_path/var/."
+sudo rm -Rf "$tmpdir"
 init_composer $final_path
 (
 cd $final_path && sudo /usr/bin/php7.2  bin/console cache:clear --env=prod