diff --git a/buildSrc/build.gradle.kts b/buildSrc/build.gradle.kts
index 86e3cfb99..29e03a3ec 100644
--- a/buildSrc/build.gradle.kts
+++ b/buildSrc/build.gradle.kts
@@ -32,6 +32,10 @@ dependencies {
     implementation("com.igormaznitsa:jcp:7.0.5")
 }
 
+kotlin {
+    jvmToolchain(8)
+}
+
 tasks {
     compileJava {
         sourceCompatibility = "1.8"