diff --git a/modules/openid-federation-client/build.gradle.kts b/modules/openid-federation-client/build.gradle.kts
index 600eb450..cab103b5 100644
--- a/modules/openid-federation-client/build.gradle.kts
+++ b/modules/openid-federation-client/build.gradle.kts
@@ -2,11 +2,10 @@ import org.jetbrains.kotlin.gradle.targets.js.webpack.KotlinWebpackConfig
 
 plugins {
     alias(libs.plugins.kotlinMultiplatform)
-//    alias(libs.plugins.androidLibrary)
     kotlin("plugin.serialization") version "2.0.0"
 }
 
-val ktorVersion = "3.0.0-beta-2"
+val ktorVersion = "2.3.12"
 
 repositories {
     mavenCentral()
@@ -34,19 +33,6 @@ kotlin {
         }
     }
 
-    // wasmJs is not available yet for ktor until v3.x is released which is still in alpha
-
-//    androidTarget {
-//        @OptIn(ExperimentalKotlinGradlePluginApi::class)
-//        compilerOptions {
-//            jvmTarget.set(JvmTarget.JVM_11)
-//        }
-//    }
-
-//    iosX64()
-//    iosArm64()
-//    iosSimulatorArm64()
-
     sourceSets {
 
         all {
@@ -91,50 +77,6 @@ kotlin {
                 implementation("com.nimbusds:nimbus-jose-jwt:9.40")
             }
         }
-//  TODO Should be placed back at a later point in time: https://sphereon.atlassian.net/browse/OIDF-50
-//        val androidMain by getting {
-//            dependencies {
-//                implementation("io.ktor:ktor-client-core-jvm:$ktorVersion")
-//                implementation("io.ktor:ktor-client-cio-jvm:$ktorVersion")
-//            }
-//        }
-//        val androidUnitTest by getting {
-//            dependencies {
-//                implementation(kotlin("test-junit"))
-//            }
-//        }
-
-//        val iosMain by creating {
-//            dependsOn(commonMain)
-//        }
-//        val iosX64Main by getting {
-//            dependsOn(iosMain)
-//            dependencies {
-//                implementation("io.ktor:ktor-client-core-iosx64:$ktorVersion")
-//                implementation("io.ktor:ktor-client-cio-iosx64:$ktorVersion")
-//            }
-//        }
-//        val iosArm64Main by getting {
-//            dependsOn(iosMain)
-//            dependencies {
-//                implementation("io.ktor:ktor-client-core-iosarm64:$ktorVersion")
-//                implementation("io.ktor:ktor-client-cio-iosarm64:$ktorVersion")
-//            }
-//        }
-//        val iosSimulatorArm64Main by getting {
-//            dependsOn(iosMain)
-//            dependencies {
-//                implementation("io.ktor:ktor-client-core-iossimulatorarm64:$ktorVersion")
-//                implementation("io.ktor:ktor-client-cio-iossimulatorarm64:$ktorVersion")
-//            }
-//        }
-//
-//        val iosTest by creating {
-//            dependsOn(commonTest)
-//            dependencies {
-//                implementation(kotlin("test"))
-//            }
-//        }
 
         val jsMain by getting {
             dependencies {
@@ -152,27 +94,9 @@ kotlin {
                 implementation(kotlin("test-js"))
                 implementation(npm("jose", "5.6.3"))
                 implementation(kotlin("test-annotations-common"))
+                implementation("io.ktor:ktor-client-mock-js:$ktorVersion")
                 implementation("org.jetbrains.kotlinx:kotlinx-coroutines-test:1.9.0-RC")
             }
         }
     }
 }
-
-//tasks.register("printSdkLocation") {
-//    doLast {
-//        println("Android SDK Location: ${android.sdkDirectory}")
-//    }
-//}
-//
-//android {
-//    namespace = "com.sphereon.oid.fed.common"
-//    compileSdk = libs.versions.android.compileSdk.get().toInt()
-//    compileOptions {
-//        sourceCompatibility = JavaVersion.VERSION_11
-//        targetCompatibility = JavaVersion.VERSION_11
-//    }
-//    defaultConfig {
-//        minSdk = libs.versions.android.minSdk.get().toInt()
-//    }
-//}
-
diff --git a/modules/openid-federation-client/src/jsMain/kotlin/com/sphereon/oid/fed/client/validation/TrustChainValidation.js.kt b/modules/openid-federation-client/src/jsMain/kotlin/com/sphereon/oid/fed/client/validation/TrustChainValidation.js.kt
index 6fc6649d..f5bad782 100644
--- a/modules/openid-federation-client/src/jsMain/kotlin/com/sphereon/oid/fed/client/validation/TrustChainValidation.js.kt
+++ b/modules/openid-federation-client/src/jsMain/kotlin/com/sphereon/oid/fed/client/validation/TrustChainValidation.js.kt
@@ -1,8 +1,6 @@
 package com.sphereon.oid.fed.client.validation
 
 import com.sphereon.oid.fed.common.jwt.JwtService
-import com.sphereon.oid.fed.openapi.models.EntityConfigurationStatement
-import io.ktor.client.engine.*
 import kotlinx.coroutines.CoroutineName
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.promise
@@ -16,10 +14,10 @@ class TrustChainValidation(val jwtService: JwtService) {
 
     fun readAuthorityHints(
         partyBId: String,
-        engine: HttpClientEngine,
-        trustChains: MutableList<List<EntityConfigurationStatement>> = mutableListOf(),
-        trustChain: MutableSet<EntityConfigurationStatement> = mutableSetOf()
-    ): Promise<List<List<EntityConfigurationStatement>>> = CoroutineScope(context = CoroutineName(NAME)).promise {
+        engine: dynamic,
+        trustChains: dynamic,
+        trustChain: dynamic
+    ): Promise<dynamic> = CoroutineScope(context = CoroutineName(NAME)).promise {
         TrustChainValidationCommon(jwtService)
             .readAuthorityHints(
                 partyBId = partyBId,
@@ -30,8 +28,8 @@ class TrustChainValidation(val jwtService: JwtService) {
     }
 
     fun fetchSubordinateStatements(
-        entityConfigurationStatementsList: List<List<EntityConfigurationStatement>>,
-        engine: HttpClientEngine
+        entityConfigurationStatementsList: dynamic,
+        engine: dynamic
     ): Promise<List<List<String>>> = CoroutineScope(context = CoroutineName(NAME)).promise {
         TrustChainValidationCommon(jwtService)
             .fetchSubordinateStatements(
diff --git a/modules/openid-federation-client/src/jsTest/kotlin/com/sphereon/oid/fed/client/validation/TrustChainValidationTest.kt b/modules/openid-federation-client/src/jsTest/kotlin/com/sphereon/oid/fed/client/validation/TrustChainValidationTest.kt
index 7be704be..da3db5b6 100644
--- a/modules/openid-federation-client/src/jsTest/kotlin/com/sphereon/oid/fed/client/validation/TrustChainValidationTest.kt
+++ b/modules/openid-federation-client/src/jsTest/kotlin/com/sphereon/oid/fed/client/validation/TrustChainValidationTest.kt
@@ -443,7 +443,9 @@ class TrustChainValidationTest {
             listOfEntityConfigurationStatementList,
             TrustChainValidation(jwtServiceImpl).readAuthorityHints(
                 partyBId = "https://edugain.org/federation",
-                engine = mockEngine
+                engine = mockEngine,
+                trustChains = mutableListOf(mutableListOf<EntityConfigurationStatement>()),
+                trustChain = mutableListOf<EntityConfigurationStatement>(),
             ).await()
         )
     }