diff --git a/demo-server/pom.xml b/demo-server/pom.xml
index 19cc035..f2d1c51 100644
--- a/demo-server/pom.xml
+++ b/demo-server/pom.xml
@@ -49,7 +49,7 @@
     <dependency>
       <groupId>org.hibernate</groupId>
       <artifactId>hibernate-validator</artifactId>
-      <version>4.2.0.Final</version>
+      <version>5.3.5.Final</version>
       <scope>runtime</scope>
     </dependency>
     <dependency>