diff --git a/start.sh b/start.sh
index d6251ac..2930ca4 100644
--- a/start.sh
+++ b/start.sh
@@ -77,8 +77,11 @@ export NO_OPENAPI="True"
 # Proxy settings for Cloudron's reverse proxy
 export LITELLM_PROXY_BASE_URL="https://${CLOUDRON_APP_DOMAIN}"
 
-# Allow requests from Cloudron's Open WebUI, LobeChat, etc.
-export LITELLM_CORS_ALLOWED_ORIGINS="${CLOUDRON_WEB_ORIGIN:-*}"
+# CORS: lock browser access to the co-op's own chat origin. The gateway is
+# called server-to-server (chat → portal → gateway) and by member API keys
+# (curl/SDKs, not browsers), so no wildcard is needed. A `*` here (the old
+# fallback) would let any website's JS hit the gateway.
+export LITELLM_CORS_ALLOWED_ORIGINS="https://chat.inference.coop"
 
 echo "PostgreSQL: ${CLOUDRON_POSTGRESQL_HOST}:${CLOUDRON_POSTGRESQL_PORT}"
 echo "Redis: ${CLOUDRON_REDIS_HOST}:${CLOUDRON_REDIS_PORT}"