diff --git a/marathon-gradle-plugin/build.gradle.kts b/marathon-gradle-plugin/build.gradle.kts
index ec32edbf6..5a2556142 100644
--- a/marathon-gradle-plugin/build.gradle.kts
+++ b/marathon-gradle-plugin/build.gradle.kts
@@ -1,3 +1,5 @@
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
 plugins {
     `java-gradle-plugin`
     `kotlin-dsl`
@@ -46,3 +48,8 @@ tasks.processResources.configure {
     duplicatesStrategy = DuplicatesStrategy.EXCLUDE
     dependsOn(rootProject.project("cli").tasks.getByName("distZip"))
 }
+
+tasks.withType<KotlinCompile> {
+    kotlinOptions.jvmTarget = "1.8"
+    kotlinOptions.apiVersion = "1.5"
+}