diff --git a/spring-boot-REST-OAuth2/oauth2-authorization-server-with-mongo-token-store/pom.xml b/spring-boot-REST-OAuth2/oauth2-authorization-server-with-mongo-token-store/pom.xml
index cc73ce7b..56cc2391 100644
--- a/spring-boot-REST-OAuth2/oauth2-authorization-server-with-mongo-token-store/pom.xml
+++ b/spring-boot-REST-OAuth2/oauth2-authorization-server-with-mongo-token-store/pom.xml
@@ -42,7 +42,7 @@
         <dependency>
             <groupId>org.springframework.security.oauth</groupId>
             <artifactId>spring-security-oauth2</artifactId>
-            <version>2.3.2.RELEASE</version>
+            <version>2.3.5.RELEASE</version>
         </dependency>
         <!-- https://mvnrepository.com/artifact/org.springframework.data/spring-data-mongodb -->
         <dependency>