diff --git a/gradle/plugins/build.gradle.kts b/gradle/plugins/build.gradle.kts
index b8e94e9..975216e 100644
--- a/gradle/plugins/build.gradle.kts
+++ b/gradle/plugins/build.gradle.kts
@@ -1,3 +1,4 @@
+import org.gradle.api.tasks.compile.JavaCompile
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {
@@ -20,7 +21,7 @@ dependencies {
     implementation("de.aaschmid:gradle-cpd-plugin:3.3")
 
     // kotlin plugin, required by custom plugin
-    implementation(kotlin("gradle-plugin", "1.8.10"))
+    implementation(kotlin("gradle-plugin", "1.9.10"))
 
     implementation(kotlin("stdlib-jdk8"))
 }
@@ -30,6 +31,11 @@ compileKotlin.kotlinOptions {
     jvmTarget = "17"
 }
 
+tasks.withType<JavaCompile>().configureEach {
+    sourceCompatibility = "17"
+    targetCompatibility = "17"
+}
+
 gradlePlugin {
     plugins {
         create("api-generator-android") {