diff --git a/public/robots.txt b/public/robots.txt
index abd4af8ab..5fb2d1597 100644
--- a/public/robots.txt
+++ b/public/robots.txt
@@ -1,3 +1,4 @@
 User-agent: *
 Disallow: /projects/gantt
 Disallow: /projects/calendar
+Disallow: /repositories/diff