ktor client https request with self signed certificate

I have a Ktor server application (REST API) with a self signed certificate.

From the browser (after the warning and confirmation) it works fine, port 80 redirects to 8443.

However, if I try this from the Ktor Apache Client:

fun main(args: Array<String>) = runBlocking {

    val client = HttpClient(Apache) {
        install(JsonFeature) {
            serializer = GsonSerializer()
        }
    }

    val job = GlobalScope.launch {
        try {
            //self-signed certificate
            val resultWillFail = client.get<String>("https://10.0.0.11:8443/get-my-services")
            println("${resultWillFail}")
            val resultOk = client.get<String>("https://en.wikipedia.org/wiki/Main_Page") //ok
            println("${resultOk}")
        } catch (e: Exception) {
            println("Error: ${e.message}")
        }
    }

    job.join()
}

My request to https://10.0.0.11:8443/get-my-services will fail:

Error: General SSLEngine problem

I also tried the same using curl:

curl: (77) schannel: Next InitializeSecurityContext failed: SEC_E_UNTRUSTED_ROOT (0x80090325) - The certificate chain was issued by an untrusted authority.

So my question is: how to use self signed certificate in ktor client (Apache)?

Thanks, J