diff --git a/src/haunt_fm/api/history.py b/src/haunt_fm/api/history.py
index 2ce2a08..4ff2a9e 100644
--- a/src/haunt_fm/api/history.py
+++ b/src/haunt_fm/api/history.py
@@ -6,6 +6,7 @@ from sqlalchemy.ext.asyncio import AsyncSession
 
 from haunt_fm.db import get_session
 from haunt_fm.services.history_ingest import ingest_listen_event
+from haunt_fm.services.taste_profile import build_taste_profile
 
 router = APIRouter(prefix="/api/history")
 
@@ -38,4 +39,8 @@ async def receive_webhook(payload: WebhookPayload, session: AsyncSession = Depen
     )
     if event is None:
         return {"ok": True, "duplicate": True}
+
+    # Rebuild taste profile on every new listen event (cheap: just a weighted average)
+    await build_taste_profile(session)
+
     return {"ok": True, "track_id": event.track_id, "event_id": event.id}