diff --git a/dbui/dbui.go b/dbui/dbui.go
index 78668f3..5a1ccf4 100644
--- a/dbui/dbui.go
+++ b/dbui/dbui.go
@@ -413,41 +413,3 @@ func isText(b []byte) bool {
     }
     return true
 }
-
-// MigrateMsgpack converts JSON values to msgpack in the five buckets that the bot
-// reads and writes as structured data. It is called once on startup before any
-// goroutine reads or writes them. Each value that begins with '{' (a JSON object)
-// and passes json.Unmarshal is re-encoded with msgpack. Values already in msgpack
-// format (binary, not starting with '{') are left alone, so a second run is a
-// no-op.
-func MigrateMsgpack(db *bbolt.DB) error {
-    var buckets = []string{"blocks-stat", "market", "miners-stat", "rates", "watches"}
-    var total int
-    for _, name := range buckets {
-        var count int
-        var err = db.Update(func(tx *bbolt.Tx) error {
-            var b = tx.Bucket([]byte(name))
-            if b == nil { return nil } // bucket doesn't exist yet — nothing to migrate
-            var c = b.Cursor()
-            for k, v := c.First(); k != nil; k, v = c.Next() {
-                if len(v) == 0 || v[0] != '{' { continue }
-                var val any
-                if json.Unmarshal(v, &val) != nil { continue }
-                var encoded, merr = msgpack.Marshal(val)
-                if merr != nil { return merr }
-                if err := b.Put(k, encoded); err != nil { return err }
-                count++
-            }
-            return nil
-        })
-        if err != nil { return err }
-        if count > 0 {
-            logging.Info("database UI: migrated %s: %d keys JSON → msgpack", name, count)
-            total += count
-        }
-    }
-    if total > 0 {
-        logging.Info("database UI: migration complete: %d keys total converted", total)
-    }
-    return nil
-}
diff --git a/main.go b/main.go
index e7e6acf..8f36f69 100644
--- a/main.go
+++ b/main.go
@@ -72,9 +72,6 @@ func main() {
     if err = openDB(*dbPath); err != nil {
         logging.Fatal("open database: %v", err)
     }
-    if err = dbui.MigrateMsgpack(db); err != nil {
-        logging.Fatal("msgpack migration: %v", err)
-    }
     rates.Start()
     if *dbuiListen != "" {
         dbuiSrv = dbui.Start(db, *dbuiListen)
diff --git a/tools/dbui/dbui b/tools/dbui/dbui
deleted file mode 100755
index 2f6ddbb..0000000
Binary files a/tools/dbui/dbui and /dev/null differ