diff --git a/Source/domainset/reject_sukka.conf b/Source/domainset/reject_sukka.conf
index 4bb448eb..a831bcf4 100644
--- a/Source/domainset/reject_sukka.conf
+++ b/Source/domainset/reject_sukka.conf
@@ -69,6 +69,11 @@ optimus-ads.amap.com
 .macdown.com
 .zupee.com
 .screenstudio.vip
+# Polyfill.io
+# https://blog.huli.tw/2024/06/25/stop-using-polyfill-io/
+# https://sansec.io/research/polyfill-supply-chain-attack
+# https://www.bleepingcomputer.com/news/security/polyfillio-javascript-supply-chain-attack-impacts-over-100k-sites/
+.polyfill.io
 # Rest of Malware / Scam
 .hubside.fr