diff --git a/templates/robots.txt b/templates/robots.txt
index 479cfbc..f7a24ae 100644
--- a/templates/robots.txt
+++ b/templates/robots.txt
@@ -1,3 +1,4 @@
 User-agent: *
 Sitemap: {{ get_url(path="sitemap.xml") }}
-Disallow: /formats/*
+Disallow: /formats/*/index.html
+Disallow: /formats/index.html