diff --git a/public_suffix_list.dat b/public_suffix_list.dat
index 11448bcfc..78d210048 100644
--- a/public_suffix_list.dat
+++ b/public_suffix_list.dat
@@ -13790,6 +13790,10 @@ iopsys.se
 // Submitted by Matthew Hardeman <mhardeman@ipifony.com>
 ipifony.net
 
+// is-a.dev : https://www.is-a.dev
+// Submitted by William Harrison <admin@maintainers.is-a.dev>
+is-a.dev
+
 // ir.md : https://nic.ir.md
 // Submitted by Ali Soizi <info@nic.ir.md>
 ir.md