diff --git a/example/spring-batch-javax/build.gradle.kts b/example/spring-batch-javax/build.gradle.kts
index 6dcb0ee65..e021ee6c3 100644
--- a/example/spring-batch-javax/build.gradle.kts
+++ b/example/spring-batch-javax/build.gradle.kts
@@ -25,7 +25,7 @@ dependencies {
 }
 
 kotlin {
-    jvmToolchain(8)
+    jvmToolchain(11)
 
     compilerOptions {
         apiVersion = KotlinVersion.KOTLIN_1_9
diff --git a/example/spring-data-jpa-javax/build.gradle.kts b/example/spring-data-jpa-javax/build.gradle.kts
index 41f514c10..aae5d23f2 100644
--- a/example/spring-data-jpa-javax/build.gradle.kts
+++ b/example/spring-data-jpa-javax/build.gradle.kts
@@ -23,7 +23,7 @@ dependencies {
 }
 
 kotlin {
-    jvmToolchain(8)
+    jvmToolchain(11)
 
     compilerOptions {
         apiVersion = KotlinVersion.KOTLIN_1_9