diff --git a/nginx/domains/firmware.ffmuc.net.conf b/nginx/domains/firmware.ffmuc.net.conf
index 5e572e0..984f0d5 100644
--- a/nginx/domains/firmware.ffmuc.net.conf
+++ b/nginx/domains/firmware.ffmuc.net.conf
@@ -78,12 +78,12 @@ server {
 
         # Add Gluon releases here that allow an upgrade path to the latest version
         # https://github.com/freifunk-gluon/gluon/wiki/Release-life-cycle#migration-paths-diagram
-        set $gluon_v2019_1_x gluon_v2021.1.x; # we want routers to upgrade from v2019 to v2021 and only then attempt v2023
-        set $gluon_v2021_1_x gluon_v2021.1.x_v2023.1.x;
-        set $gluon_v2022_1_x gluon_v2023.1.x_v2023.2.x;
-        set $gluon_v2023_1_x gluon_v2023.1.x_v2023.2.x;
-        set $gluon_v2023_2_x gluon_v2023.1.x_v2023.2.x;
-        set $gluon_next gluon_next;
+        set $gluon_v2019_1_x "gluon-v2021.1.x"; # we want routers to upgrade from v2019 to v2021 and only then attempt v2023
+        set $gluon_v2021_1_x "gluon-v2021.1.x_v2023.1.x";
+        set $gluon_v2022_1_x "gluon-v2023.1.x_v2023.2.x";
+        set $gluon_v2023_1_x "gluon-v2023.1.x_v2023.2.x";
+        set $gluon_v2023_2_x "gluon-v2023.1.x_v2023.2.x";
+        set $gluon_next "gluon-next";
 
         if ($targetDirectory = "keep") {
             break;