diff --git a/content/en/docs/rate-limits.md b/content/en/docs/rate-limits.md
index 01269e926..1ade2d38f 100644
--- a/content/en/docs/rate-limits.md
+++ b/content/en/docs/rate-limits.md
@@ -1,7 +1,7 @@
 ---
 title: Rate Limits
 slug: rate-limits
-lastmod: 2025-06-12
+lastmod: 2026-07-03
 show_lastmod: true
 ---
 
@@ -339,7 +339,8 @@ We include a `Retry-After` header in all rate limit error responses, indicating
 the duration your client should wait before retrying.
 
 You can get a list of certificates issued for your registered domain by
-searching [crt.sh](https://crt.sh/) or [Censys](https://search.censys.io/#),
+searching [crt.sh](https://crt.sh/), [Censys](https://search.censys.io/#),
+or [CertObserver CT search](https://certobserver.com/ct-search),
 which use the public [Certificate
 Transparency](https://www.certificate-transparency.org/) logs.