diff --git a/src/cmd/server/handler/ui.go b/src/cmd/server/handler/ui.go
index 851d996..35fcfac 100644
--- a/src/cmd/server/handler/ui.go
+++ b/src/cmd/server/handler/ui.go
@@ -35,6 +35,7 @@ func (h Handler) ui(w http.ResponseWriter, r *http.Request) error {
 		return h.uiIndex(w, r)
 	}
 
+	w.Header().Set("Cache-Control", "max-age=2592000")
 	fs := http.FileServer(http.FS(embeddedDir))
 	r.URL.Path = fmt.Sprintf("/testdata/%s", strings.TrimPrefix(r.URL.Path, "/experimental/ui"))
 	fs.ServeHTTP(w, r)