diff --git a/setup/so-preflight b/setup/so-preflight
index 05ff75826..69435446a 100644
--- a/setup/so-preflight
+++ b/setup/so-preflight
@@ -80,6 +80,8 @@ check_misc_urls() {
 		"https://github.com/Neo23x0/signature-base"
 		"https://sigs.securityonion.net/$so_version/securityonion-$so_version.iso.sig"
 		"https://ghcr.io/"
+		"https://rules.emergingthreats.net/open/"
+		"https://rules.emergingthreatspro.com/"
 	)
 
 	__check_url_arr "${url_arr[@]}"