diff --git a/roles/web_svc/templates/tiles_vhost.j2 b/roles/web_svc/templates/tiles_vhost.j2
index 24aaae2..3e489c1 100644
--- a/roles/web_svc/templates/tiles_vhost.j2
+++ b/roles/web_svc/templates/tiles_vhost.j2
@@ -29,8 +29,10 @@ server {
 		proxy_pass http://10.90.224.103/styles/day/$1;
 
 		proxy_cache tilecache;
+		proxy_cache_background_update on;
+		proxy_cache_lock on;
 		proxy_cache_use_stale error timeout invalid_header updating http_500 http_502 http_503 http_504;
-		proxy_cache_valid 200 1d;
+		proxy_cache_valid 200 7d;
 		proxy_cache_valid any 1m;
 
 		proxy_ignore_headers Expires Cache-Control;
@@ -42,8 +44,10 @@ server {
 		proxy_pass http://10.90.224.103/styles/night/$1;
 
 		proxy_cache tilecache;
+		proxy_cache_background_update on;
+		proxy_cache_lock on;
 		proxy_cache_use_stale error timeout invalid_header updating http_500 http_502 http_503 http_504;
-		proxy_cache_valid 200 1d;
+		proxy_cache_valid 200 7d;
 		proxy_cache_valid any 1m;
 
 		proxy_ignore_headers Expires Cache-Control;