diff --git a/SampleApplications/NativeApp/build.gradle.kts b/SampleApplications/NativeApp/build.gradle.kts
index b91576bc..0f18371a 100644
--- a/SampleApplications/NativeApp/build.gradle.kts
+++ b/SampleApplications/NativeApp/build.gradle.kts
@@ -6,13 +6,13 @@ plugins {
 
 
 kotlin {
-    targetHierarchy.default()
-
     linuxX64()
     mingwX64()
     macosX64()
     macosArm64()
 
+    applyDefaultHierarchyTemplate()
+
 
     val kotlinxSerializationVersion: String by project
 
diff --git a/fints4k/build.gradle b/fints4k/build.gradle
index ca6ebf32..96e8ff54 100644
--- a/fints4k/build.gradle
+++ b/fints4k/build.gradle
@@ -8,11 +8,15 @@ plugins {
 
 
 kotlin {
-    // Enable the default target hierarchy:
-    targetHierarchy.default()
+    jvmToolchain(8)
+
+    compilerOptions {
+        // suppresses compiler warning: [EXPECT_ACTUAL_CLASSIFIERS_ARE_IN_BETA_WARNING] 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta.
+        freeCompilerArgs.add("-Xexpect-actual-classes")
+    }
+
 
     jvm {
-        jvmToolchain(8)
         withJava() // not allowed if android { } is present
 
         testRuns["test"].executionTask.configure {
@@ -24,7 +28,7 @@ kotlin {
         }
     }
 
-    js(IR) {
+    js {
         binaries.executable()
 
         browser {
@@ -43,22 +47,17 @@ kotlin {
     linuxX64()
     mingwX64()
 
-
-    ios {
-        binaries {
-            framework {
-                baseName = "fints4k"
-            }
-        }
-    }
+    iosArm64()
     iosSimulatorArm64()
     macosX64()
     macosArm64()
-    watchos()
+    watchosArm64()
     watchosSimulatorArm64()
-    tvos()
+    tvosArm64()
     tvosSimulatorArm64()
 
+    applyDefaultHierarchyTemplate()
+
 
     sourceSets {
         commonMain {