diff --git a/etc/unbound/unbound.conf.d/blocklist.conf b/etc/unbound/unbound.conf.d/blocklist.conf
index 40062fc6..0981ccca 100644
--- a/etc/unbound/unbound.conf.d/blocklist.conf
+++ b/etc/unbound/unbound.conf.d/blocklist.conf
@@ -14,3 +14,8 @@ local-zone: "www.google-analytics.com." always_refuse
 # On top NextDNS blocks after Google Analytics, while I am not entirely sure
 # blocking it is in my interests.
 local-zone: "incoming.telemetry.mozilla.org." always_refuse
+
+# Theoretically breaks nothing as clients should handle it.
+# https://aminda.eu/matrix/#why-do-you-use-matrix-uri-scheme-instead-of-matrixto
+# https://matrix.to/#/!KMbEUhVQHLwZHmwzKX:matrix.org/$jvB1PAivkIzRKQdlU_KFAtyPW_8Gv9o5tygud_09CRY?via=pikaviestin.fi&via=grin.hu&via=tchncs.de
+local-zone: "matrix.to." always_refuse