diff --git a/src/robots.txt.ejs b/src/robots.txt.ejs
index 64d93747026..a54a06490a8 100644
--- a/src/robots.txt.ejs
+++ b/src/robots.txt.ejs
@@ -31,6 +31,9 @@ Disallow: /communities/*/search
 # one (&f.), and robots.txt has no way to express "either".
 Disallow: /*?f.
 Disallow: /*&f.
+# Heavy Discovery facet queries on browse pages
+Disallow: /collections/*?f
+Disallow: /communities/*?spc.page
 
 # Optionally uncomment the following line ONLY if sitemaps are working
 # and you have verified that your site is being indexed correctly.