diff --git a/data/refdata/exchanges.cfg b/data/refdata/exchanges.cfg
index b2c4f8a..62e4131 100644
--- a/data/refdata/exchanges.cfg
+++ b/data/refdata/exchanges.cfg
@@ -343,6 +343,7 @@
         , "type":               "FUTURES"
 
         , "mktdata" : {
+            "credentials_key": "COINBASE_ADV_RO"
             "class":  "cvttpy_trading.exchanges.coinbase.spot.mkt_data.CoinbaseMdFeed"
 
             , "reconnect_secs": 2