diff --git a/appengine-standard-java8/kotlin-sb-appengine-standard/pom.xml b/appengine-standard-java8/kotlin-sb-appengine-standard/pom.xml
index 43a9af37e..233c7c7eb 100644
--- a/appengine-standard-java8/kotlin-sb-appengine-standard/pom.xml
+++ b/appengine-standard-java8/kotlin-sb-appengine-standard/pom.xml
@@ -49,7 +49,7 @@ limitations under the License.
     <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-web</artifactId>
-      <version>3.1.1</version>
+      <version>4.0.0</version>
       <exclusions>
         <exclusion>
           <groupId>org.slf4j</groupId>