diff --git a/test-compose/ui/Dockerfile b/test-compose/ui/Dockerfile
index 336c9d3..c3375df 100644
--- a/test-compose/ui/Dockerfile
+++ b/test-compose/ui/Dockerfile
@@ -4,7 +4,7 @@ MAINTAINER tier-packaging@internet2.edu <tier-packaging@internet2.edu>
 
 ##tomcat
 ENV TOMCAT_MAJOR=8
-ENV TOMCAT_VERSION="8.5.20"
+ENV TOMCAT_VERSION="8.5.23"
 
 COPY classes/ /opt/apache-tomcat-$TOMCAT_VERSION/webapps/grouper/WEB-INF/classes
 COPY tomcat/ /opt/apache-tomcat-$TOMCAT_VERSION/conf/