diff --git a/cache/cache.go b/cache/cache.go
index d68228c47f6..1845a2c0f30 100644
--- a/cache/cache.go
+++ b/cache/cache.go
@@ -54,7 +54,9 @@ func NewCacheService(opts ...option.RequestOption) (r *CacheService) {
 //
 // **NB:** When including the Origin header, be sure to include the **scheme** and
 // **hostname**. The port number can be omitted if it is the default port (80 for
-// http, 443 for https), but must be included otherwise.
+// http, 443 for https), but must be included otherwise. **NB:** For Zones on
+// Free/Pro/Business plan, you may purge up to 30 URLs in one API call. For Zones
+// on Enterprise plan, you may purge up to 500 URLs in one API call.
 //
 // ### Purge Cached Content by Tag, Host or Prefix
 //