diff --git a/content/docs/usage/ingress.md b/content/docs/usage/ingress.md
index 6a5ee35db49..ecc5cf23b32 100644
--- a/content/docs/usage/ingress.md
+++ b/content/docs/usage/ingress.md
@@ -136,7 +136,7 @@ trigger Certificate resources to be automatically created:
 
 - `cert-manager.io/subject-serialnumber`: (optional) this annotation allows you to
   configure `spec.subject.serialNumber` field for the Certificate to be generated.
-  Supports comma-separated values e.g. "123 Example St,456 Other Blvd"
+  Supports comma-separated values e.g. "10978342379280287615,1111144445555522228888"
 
 - ` cert-manager.io/duration`: (optional) this annotation allows you to
   configure `spec.duration` field for the Certificate to be generated.