diff --git a/nginx/domains/firmware.ffmuc.net.conf b/nginx/domains/firmware.ffmuc.net.conf
index 12131ab..ee50491 100644
--- a/nginx/domains/firmware.ffmuc.net.conf
+++ b/nginx/domains/firmware.ffmuc.net.conf
@@ -54,8 +54,9 @@ server {
             break;
         }
 
-        set $latest_v2022_5 v2022.5.8;
-        set $latest_v2024_6 v2024.6.1;
+        set $gluon_v2019_1_x gluon_v2021.1.x; # we do not have an upgrade path for v2018 and earlier yet
+        set $gluon_v2021_1_x gluon_v2021.1.x;
+        set $gluon_v2023_1_x gluon_v2023.1.x;
 
         if ($targetDirectory = "keep") {
             break;