diff --git a/docker-compose.yml b/docker-compose.yml
index e8df585..0e5e99b 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -142,7 +142,7 @@ services:
       - ./backend:/app
       - uploads:/app/uploads
       - /opt/blender:/opt/blender:ro
-      - optix-cache:/root/.nv          # persist OptiX BVH/kernel cache across rebuilds
+      - optix-cache:/var/tmp/OptixCache_root   # persist OptiX kernel cache across container restarts
     depends_on:
       postgres:
         condition: service_healthy