diff --git a/elasticmagic-transport-ktor/api/elasticmagic-transport-ktor.api b/elasticmagic-transport-ktor/api/elasticmagic-transport-ktor.api
index fc2230da24..b6fcbd0c53 100644
--- a/elasticmagic-transport-ktor/api/elasticmagic-transport-ktor.api
+++ b/elasticmagic-transport-ktor/api/elasticmagic-transport-ktor.api
@@ -1,5 +1,5 @@
 public final class dev/evo/elasticmagic/transport/ElasticsearchKtorTransport : dev/evo/elasticmagic/transport/ElasticsearchTransport {
-	public fun <init> (Ljava/lang/String;Lio/ktor/client/engine/HttpClientEngine;Lkotlin/jvm/functions/Function1;)V
-	public synthetic fun <init> (Ljava/lang/String;Lio/ktor/client/engine/HttpClientEngine;Lkotlin/jvm/functions/Function1;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public fun <init> (Ljava/lang/String;Lio/ktor/client/engine/HttpClientEngine;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;)V
+	public synthetic fun <init> (Ljava/lang/String;Lio/ktor/client/engine/HttpClientEngine;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
 }
 
diff --git a/elasticmagic-transport-ktor/src/commonMain/kotlin/dev/evo/elasticmagic/transport/ElasticsearchKtorTransport.kt b/elasticmagic-transport-ktor/src/commonMain/kotlin/dev/evo/elasticmagic/transport/ElasticsearchKtorTransport.kt
index eb1fb62eed..442ebd5851 100644
--- a/elasticmagic-transport-ktor/src/commonMain/kotlin/dev/evo/elasticmagic/transport/ElasticsearchKtorTransport.kt
+++ b/elasticmagic-transport-ktor/src/commonMain/kotlin/dev/evo/elasticmagic/transport/ElasticsearchKtorTransport.kt
@@ -22,7 +22,7 @@ import io.ktor.http.takeFrom
 class ElasticsearchKtorTransport(
     baseUrl: String,
     engine: HttpClientEngine,
-    val customHttpClientConfig: HttpClientConfig<*>.() -> Unit = {},
+    private val customHttpClientConfig: HttpClientConfig<*>.() -> Unit = {},
     configure: Config.() -> Unit = {},
 ) : ElasticsearchTransport(
     baseUrl,