diff --git a/complete/build.gradle b/complete/build.gradle
index ccbd1d1..fe3e0d2 100644
--- a/complete/build.gradle
+++ b/complete/build.gradle
@@ -1,6 +1,6 @@
 plugins {
 	id 'java'
-	id 'org.springframework.boot' version '3.5.8'
+	id 'org.springframework.boot' version '3.5.9'
 	id 'io.spring.dependency-management' version '1.1.7'
 	id 'org.asciidoctor.jvm.convert' version '2.4.0'
 }
diff --git a/initial/build.gradle b/initial/build.gradle
index 900ac6c..782ce00 100644
--- a/initial/build.gradle
+++ b/initial/build.gradle
@@ -1,5 +1,5 @@
 plugins {
-	id 'org.springframework.boot' version '3.5.8'
+	id 'org.springframework.boot' version '3.5.9'
 	id 'io.spring.dependency-management' version '1.1.7'
 	id 'java'
 }