diff --git a/deploy/Caddyfile.tmpl b/deploy/Caddyfile.tmpl
index 044f3c4..8339e02 100644
--- a/deploy/Caddyfile.tmpl
+++ b/deploy/Caddyfile.tmpl
@@ -36,12 +36,15 @@ __HOST__ {
 	# Everything else is the static site. SvelteKit writes each route as
 	# <route>.html, so /rules is tried as /rules.html before falling back to the
 	# app shell, which serves the rooms. Hashed assets under _app/immutable are
-	# cached for a year; every other response is revalidated so a deploy shows
-	# up on the next load.
+	# cached for a year, and the glass board's figures, which weigh a few
+	# megabytes and seldom change, for a week; every other response is
+	# revalidated so a deploy shows up on the next load.
 	handle {
 		@immutable path /_app/immutable/*
 		header @immutable Cache-Control "public, max-age=31536000, immutable"
-		@mutable not path /_app/immutable/*
+		@figures path /figures/*
+		header @figures Cache-Control "public, max-age=604800"
+		@mutable not path /_app/immutable/* /figures/*
 		header @mutable Cache-Control "no-cache"
 		try_files {path} {path}.html /index.html
 		file_server