diff --git a/data/apps/cvtt_musvc_sim.cfg b/data/apps/cvtt_musvc_sim.cfg
index 6410739..11c70c9 100644
--- a/data/apps/cvtt_musvc_sim.cfg
+++ b/data/apps/cvtt_musvc_sim.cfg
@@ -113,8 +113,8 @@
         , "historical_md": {
             "db": {
                 # "cred_key": "TSDB-CLD32-TESTER-DCKR-CMPS"
-                "cred_key": "TSDB-CLD32-TESTER-DIRECT"
-                "cred_key": "TSDB-CLD32-TESTER-DIRECT"
+                # "cred_key": "TSDB-CLD32-TESTER-DIRECT"
+                "cred_key": "@env{DB_CREDENTIALS_KEY}"
             }
             , "trades_recording": { # unconditional trades recording for 1min aggregates
                 "flush_interval_sec": 5.0