diff --git a/build.gradle.kts b/build.gradle.kts
index f77ed94..7c65cff 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -7,6 +7,11 @@ plugins {
     id("io.github.gradle-nexus.publish-plugin") version "1.1.0"
 }
 
+java {
+    sourceCompatibility = JavaVersion.VERSION_1_8
+    targetCompatibility = JavaVersion.VERSION_1_8
+}
+
 tasks.test {
     useJUnitPlatform()
 }