diff --git a/build.gradle.kts b/build.gradle.kts
index a61c7cb..0956582 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -25,6 +25,7 @@ subprojects {
         plugin("java")
         plugin("java-library")
         plugin("maven-publish")
+        plugin("org.jetbrains.kotlin.jvm")
     }
 
     java {
@@ -32,6 +33,10 @@ subprojects {
         targetCompatibility = JavaVersion.VERSION_1_8
     }
 
+    kotlin {
+        jvmToolchain(8)
+    }
+
     dependencies {
         api(kotlin("stdlib"))
         api(kotlin("reflect"))
diff --git a/gradlew b/gradlew
old mode 100644
new mode 100755