diff --git a/kmp-socketio/src/appleMain/kotlin/com/piasy/kmp/socketio/engineio/transports/transport_impl.kt b/kmp-socketio/src/appleMain/kotlin/com/piasy/kmp/socketio/engineio/transports/transport_impl.kt
index ff16810..72fbf05 100644
--- a/kmp-socketio/src/appleMain/kotlin/com/piasy/kmp/socketio/engineio/transports/transport_impl.kt
+++ b/kmp-socketio/src/appleMain/kotlin/com/piasy/kmp/socketio/engineio/transports/transport_impl.kt
@@ -4,8 +4,6 @@ import io.ktor.client.HttpClient
 import io.ktor.client.HttpClientConfig
 import io.ktor.client.engine.darwin.Darwin
 import platform.Foundation.NSURLCredential
-import platform.Foundation.NSURLSessionAuthChallengePerformDefaultHandling
-import platform.Foundation.NSURLSessionAuthChallengeUseCredential
 import platform.Foundation.create
 import platform.Foundation.serverTrust
 import platform.Security.SecTrustRef
@@ -18,9 +16,9 @@ actual fun httpClient(trustAllCerts: Boolean, config: HttpClientConfig<*>.() ->
                 val serverTrust: SecTrustRef? = challenge.protectionSpace.serverTrust
                 if (serverTrust != null) {
                     val credential = NSURLCredential.create(trust = serverTrust)
-                    completionHandler(NSURLSessionAuthChallengeUseCredential.toLong(), credential)
+                    completionHandler(0, credential)
                 } else {
-                    completionHandler(NSURLSessionAuthChallengePerformDefaultHandling.toLong(), null)
+                    completionHandler(1, null)
                 }
             }
         }