diff --git a/spring-boot/starter/application/build.gradle b/spring-boot/starter/application/build.gradle
index 9d8539d..8487066 100644
--- a/spring-boot/starter/application/build.gradle
+++ b/spring-boot/starter/application/build.gradle
@@ -6,7 +6,7 @@ plugins {
 
 group = 'io.reflectoring'
 version = '0.0.1-SNAPSHOT'
-sourceCompatibility = '11'
+sourceCompatibility = '13'
 
 repositories {
 	mavenCentral()
diff --git a/spring-boot/starter/event-starter/build.gradle b/spring-boot/starter/event-starter/build.gradle
index a90e4cc..d4f5833 100644
--- a/spring-boot/starter/event-starter/build.gradle
+++ b/spring-boot/starter/event-starter/build.gradle
@@ -5,7 +5,7 @@ plugins {
 
 group = 'io.reflectoring'
 version = '0.0.1-SNAPSHOT'
-sourceCompatibility = '11'
+sourceCompatibility = '13'
 
 repositories {
     mavenCentral()