diff --git a/deploy/mainnet/docker-compose.gateway.yml b/deploy/mainnet/docker-compose.gateway.yml
index 5dca5f0..99a4e7f 100644
--- a/deploy/mainnet/docker-compose.gateway.yml
+++ b/deploy/mainnet/docker-compose.gateway.yml
@@ -27,6 +27,13 @@ services:
       NETWORK_ID: "1"
       GATEWAY_PORT: "8080"
       GATEWAY_DB_DIR: /repo/data/gateway
+      # Mainnet chain genesis (slot↔wallclock). MUST match buyer/supplier or
+      # PostEscrow validity bounds land ~51 days off and Ogmios rejects (code 3118).
+      VECTOR_ZERO_TIME_MS: "1756485600000"
+      # On-chain reference-script UTxOs (escrow spending validator) used by
+      # Accept/Reclaim/Submit. Same values the buyer/suppliers use on mainnet.
+      ESCROW_REF_UTXO: c8d84c6d67ec67a1efe5e9c6c06d53020e05d1bb96d1c55ecb1eb7d5010c4d54#0
+      ADVERT_REF_UTXO: c8d84c6d67ec67a1efe5e9c6c06d53020e05d1bb96d1c55ecb1eb7d5010c4d54#1
     volumes:
       - gateway-mainnet-data:/repo/data/gateway
     healthcheck: