diff --git a/kotlin-native/performance/buildSrc/build.gradle.kts b/kotlin-native/performance/buildSrc/build.gradle.kts
index 86409538a0a..ce938b72b22 100644
--- a/kotlin-native/performance/buildSrc/build.gradle.kts
+++ b/kotlin-native/performance/buildSrc/build.gradle.kts
@@ -108,7 +108,12 @@ gradlePlugin {
 }
 
 afterEvaluate {
-    tasks.withType<JavaCompile> {
+    tasks.withType<JavaCompile>().configureEach {
         targetCompatibility = "1.8"
     }
+    tasks.withType<KotlinCompile>().configureEach {
+        kotlinOptions {
+            jvmTarget = "1.8"
+        }
+    }
 }