diff --git a/build-logic/convention/build.gradle.kts b/build-logic/convention/build.gradle.kts
index 28fc2b429..c04e7a916 100644
--- a/build-logic/convention/build.gradle.kts
+++ b/build-logic/convention/build.gradle.kts
@@ -15,6 +15,7 @@
  * see <http://www.gnu.org/licenses>.
  */
 
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {
@@ -30,8 +31,8 @@ java {
     targetCompatibility = JavaVersion.VERSION_17
 }
 tasks.withType<KotlinCompile>().configureEach {
-    kotlinOptions {
-        jvmTarget = JavaVersion.VERSION_17.toString()
+    compilerOptions {
+        jvmTarget.set(JvmTarget.JVM_17)
     }
 }
 
diff --git a/build-logic/convention/src/main/kotlin/app/pachli/KotlinAndroid.kt b/build-logic/convention/src/main/kotlin/app/pachli/KotlinAndroid.kt
index d932a0b80..08a2218ec 100644
--- a/build-logic/convention/src/main/kotlin/app/pachli/KotlinAndroid.kt
+++ b/build-logic/convention/src/main/kotlin/app/pachli/KotlinAndroid.kt
@@ -19,9 +19,11 @@ import app.pachli.libs
 import com.android.build.api.dsl.CommonExtension
 import org.gradle.api.JavaVersion
 import org.gradle.api.Project
+import org.gradle.kotlin.dsl.assign
 import org.gradle.kotlin.dsl.dependencies
 import org.gradle.kotlin.dsl.provideDelegate
 import org.gradle.kotlin.dsl.withType
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 /**
@@ -82,13 +84,13 @@ internal fun Project.configureKotlinJvm() {
 private fun Project.configureKotlin() {
     // Use withType to workaround https://youtrack.jetbrains.com/issue/KT-55947
     tasks.withType<KotlinCompile>().configureEach {
-        kotlinOptions {
-            jvmTarget = JavaVersion.VERSION_17.toString()
+        compilerOptions {
+            jvmTarget.set(JvmTarget.JVM_17)
             // Treat all Kotlin warnings as errors (disabled by default)
             // Override by setting warningsAsErrors=true in your ~/.gradle/gradle.properties
             val warningsAsErrors: String? by project
             allWarningsAsErrors = warningsAsErrors.toBoolean()
-            freeCompilerArgs = freeCompilerArgs + listOf(
+            freeCompilerArgs.addAll(
                 "-opt-in=kotlin.RequiresOptIn",
                 // Enable experimental coroutines APIs, including Flow
                 "-opt-in=kotlinx.coroutines.ExperimentalCoroutinesApi",