diff --git a/scripts/upgrade b/scripts/upgrade
index 88d88c4..3ee2b25 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -144,8 +144,7 @@ ynh_add_fpm_config --usage=low --footprint=low --package="$extra_php_dependencie
 #=================================================
 ynh_script_progression --message="Installing Composer..." --weight=1
 
-
-ynh_secure_remove --file="$final_path/composer.lock"
+#ynh_secure_remove --file="$final_path/composer.lock"
 
 # Upgrade composer itself
 ynh_install_composer --phpversion=$phpversion --workdir=$final_path --install_args="--prefer-source --no-dev"
@@ -169,6 +168,7 @@ if [ "$upgrade_type" == "UPGRADE_APP" ]
 then
 	ynh_script_progression --message="Upgrading Lychee source files..." --weight=4
 	pushd $final_path
+		composer install --no-dev
 		php$phpversion artisan key:generate --no-interaction --force
 		php$phpversion artisan migrate --no-interaction --force
 	popd