diff --git a/music/docker-compose.yml b/music/docker-compose.yml
index c9a0c2d..6a5aa36 100644
--- a/music/docker-compose.yml
+++ b/music/docker-compose.yml
@@ -14,6 +14,10 @@ services:
       PUID: 1000
       PGID: 100
       TZ: Australia/Perth
+      # Clamp the virtual screen. The webtop default (15360x8640) allocated a
+      # ~570MB Xvfb framebuffer per pixel-plane; 2560x1440 drops that to ~14MB.
+      # KasmVNC upscales the desktop to fit the browser, so it stays usable.
+      MAX_RES: 2560x1440
     ports:
       - "8085:3000"
     volumes: