diff --git a/scripts/upgrade b/scripts/upgrade
index b88f566..30b980e 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -212,7 +212,7 @@ chown -R $app:www-data "$datadir"
 
 if [ -z "$secrets_peertube" ]; then
 	ynh_script_progression --message="Generating and storing PeerTube secrets..."
-	secrets_peertube=$(openssl rand -hex 32)
+	secrets_peertube=$(ynh_string_random --length=24)
 	ynh_app_setting_set --app=$app --key=secrets_peertube --value=$secrets_peertube
 fi