diff --git a/data/apps/cvtt_musvc_sim.cfg b/data/apps/cvtt_musvc_sim.cfg
index 11c70c9..a23cb9b 100644
--- a/data/apps/cvtt_musvc_sim.cfg
+++ b/data/apps/cvtt_musvc_sim.cfg
@@ -228,7 +228,8 @@
             "db": {
                 # "cred_key": "TSDB-CLD32-PROD-OHLCV-DIRECT-RO"
                 # "cred_key": "TSDB-CLD32-TESTER-DCKR-CMPS"
-                "cred_key": "TSDB-CLD32-TESTER-DIRECT-RO"
+                # "cred_key": "TSDB-CLD32-TESTER-DIRECT-RO"
+                "cred_key": "@env{DB_CREDENTIALS_KEY}"
             }
             , "enable_mda_recording": false # RO account is used
         }