diff --git a/build.gradle b/build.gradle
index 241937c12..1ad7ceda6 100644
--- a/build.gradle
+++ b/build.gradle
@@ -13,7 +13,7 @@ buildscript {
 plugins {
     id 'application'
     id 'io.spring.dependency-management' version '1.1.7'
-    id 'org.springframework.boot' version '3.5.8'
+    id 'org.springframework.boot' version '4.0.0'
     id 'uk.gov.hmcts.java' version '0.12.67'
     id 'com.github.ben-manes.versions' version '0.53.0'
     id 'org.sonarqube' version '7.2.0.6526'