diff --git a/demo-server/pom.xml b/demo-server/pom.xml
index ea3d4b7..3c83c9e 100644
--- a/demo-server/pom.xml
+++ b/demo-server/pom.xml
@@ -94,7 +94,7 @@
     <dependency>
       <groupId>org.apache.tomcat.embed</groupId>
       <artifactId>tomcat-embed-core</artifactId>
-      <version>9.0.12</version>
+      <version>9.0.31</version>
       <scope>compile</scope>
     </dependency>
     <dependency>