diff --git a/Source/domainset/cdn.conf b/Source/domainset/cdn.conf
index 64db43cc..860b8468 100644
--- a/Source/domainset/cdn.conf
+++ b/Source/domainset/cdn.conf
@@ -5016,3 +5016,4 @@ media.nngroup.com
 .gauthstatic.com
 cdn.insightmediagroup.io
 assets.cello.so
+.ismcdn.jp