diff --git a/repub/web.py b/repub/web.py
index c76d0d2..22ca0d5 100644
--- a/repub/web.py
+++ b/repub/web.py
@@ -602,7 +602,6 @@ def _rss_feed_response(feed_text: str | None) -> Response:
     response.cache_control.public = True
     response.cache_control.max_age = 300
     response.expires = datetime.now(UTC) + timedelta(minutes=5)
-    response.vary.add("Host")
     response.headers["Access-Control-Allow-Origin"] = "*"
     response.headers["Access-Control-Allow-Methods"] = "GET, HEAD, OPTIONS"
     response.headers["Access-Control-Allow-Headers"] = "*"