readDouble can only be called when CurrentBSONType is DOUBLE, not when CurrentBSONType is DECIMAL128

Question

I'm trying out kmongo in my new spring boot application. With kmongo I'm using kotlin serialisation and getting an error when reading from db.

In DB, I've a Decimal128 field in my collection, I'm trying to deserialise it into a Double (or BigDecimal) field rate in Rate class.

@Serializable
data class Rate(
    val type: ConsultationType,
    val rate: Double,
    .... other fields
)

enum class ConsultationType {
    MESSAGE, VOICE, VIDEO
}

It is giving error:

org.bson.BsonInvalidOperationException: readDouble can only be called when CurrentBSONType is DOUBLE, not when CurrentBSONType is DECIMAL128.
    at org.bson.AbstractBsonReader.verifyBSONType(AbstractBsonReader.java:689) ~[bson-4.6.1.jar:na]
    at org.bson.AbstractBsonReader.checkPreconditions(AbstractBsonReader.java:721) ~[bson-4.6.1.jar:na]
    at org.bson.AbstractBsonReader.readDouble(AbstractBsonReader.java:316) ~[bson-4.6.1.jar:na]
    at com.github.jershell.kbson.FlexibleDecoder.decodeDouble(BsonFlexibleDecoder.kt:110) ~[kbson-0.4.5.jar:na]
    at kotlinx.serialization.encoding.AbstractDecoder.decodeDoubleElement(AbstractDecoder.kt:56) ~[kotlinx-serialization-core-jvm-1.4.1.jar:1.4.1]

In spring data mongo we could do:

@Field(targetType = DECIMAL128)
private BigDecimal value;

With kmongo and kotlin serialisation, What is the proper way to do this?