diff --git a/Dockerfile b/Dockerfile
index b4c87ba..e7effa3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,7 +6,7 @@ FROM centos:centos7
 #
 ##tomcat \
 ENV TOMCAT_MAJOR=9 \
-    TOMCAT_VERSION=9.0.30 \
+    TOMCAT_VERSION=9.0.31 \
 ##shib-idp \
     VERSION=4.0.0-beta1 \
 ##TIER \