diff --git a/pom.xml b/pom.xml
index 230906d1b..c9b029d25 100644
--- a/pom.xml
+++ b/pom.xml
@@ -39,7 +39,7 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <tomcat.version>8.5.23</tomcat.version>
+        <tomcat.version>9.0.31</tomcat.version>
         <lucene.version>4.10.4</lucene.version>
     </properties>