diff --git a/data/refdata/exchanges.cfg b/data/refdata/exchanges.cfg
index d2d06e7..563f741 100644
--- a/data/refdata/exchanges.cfg
+++ b/data/refdata/exchanges.cfg
@@ -399,7 +399,7 @@
         , "quote_asset":        "USDC"
 
         , "dynamic_instruments": {
-            # dynamically created instruments (perpetual futures)
+            # dynamically created instruments (perpetual/expiring futures)
             "credentials_key": "COINBASE_ADV_RO"
             "class": "cvttpy_trading.exchanges.coinbase.futures.market.InstrumentLoader"
             , "api": {