diff --git a/build.gradle b/build.gradle
index 584bc69..23cee37 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,6 +6,11 @@ plugins {
 group 'org.hmcore'
 version '1.0-SNAPSHOT'
 
+java {
+    sourceCompatibility = JavaVersion.VERSION_11
+    targetCompatibility = JavaVersion.VERSION_11
+}
+
 repositories {
     mavenCentral()
 }