diff --git a/build.gradle.kts b/build.gradle.kts
index 46b801e..4b481ac 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -22,6 +22,8 @@ repositories {
 tasks.withType<KotlinCompile> {
     kotlinOptions {
         jvmTarget = "11"
+        sourceCompatibility = "11"
+        targetCompatibility = "11"
     }
 }