diff --git a/scripts/upgrade b/scripts/upgrade
index a3f82f3..08c7fb4 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -33,13 +33,19 @@ done
 tmpdir=$(mktemp -dp /tmp/ "${APP}-upgrade-XXXXX")
 
 sudo systemctl stop "${SERVICE}"
+
+install_time=$(sudo yunohost app setting "${APP}" install_time)
 sudo cp -a "/etc/yunohost/apps/${APP}/settings.yml" "${tmpdir}/"
 
 sudo yunohost app remove "${APP}"
 sudo yunohost app install "https://github.com/${OWNER}/${REPO}" --args "${args_url}"
 
+sudo systemctl stop "${SERVICE}"
+
 sudo cp -a "${tmpdir}/settings.yml" "/etc/yunohost/apps/${APP}/"
-sudo systemctl restart "${SERVICE}"
+sudo yunohost app setting "${APP}" install_time -v "${install_time}"
+
+sudo systemctl start "${SERVICE}"
 
 sudo rm -r "${tmpdir}/"