diff --git a/buildSrc/build.gradle.kts b/buildSrc/build.gradle.kts
index d155137de2c..7f7884683d3 100644
--- a/buildSrc/build.gradle.kts
+++ b/buildSrc/build.gradle.kts
@@ -112,6 +112,11 @@ samWithReceiver {
 fun Project.`samWithReceiver`(configure: org.jetbrains.kotlin.samWithReceiver.gradle.SamWithReceiverExtension.() -> Unit): Unit =
         extensions.configure("samWithReceiver", configure)
 
+java {
+    sourceCompatibility = JavaVersion.VERSION_1_8
+    targetCompatibility = JavaVersion.VERSION_1_8
+}
+
 tasks["build"].dependsOn(":prepare-deps:build")
 
 allprojects {