The current dependency to tomcat is 8.0.x, which has been announced as [End of Life](http://tomcat.apache.org/tomcat-80-eol.html) on 30 June 2018. So we should upgrade tomcat to 8.5.x.
The current dependency to tomcat is 8.0.x, which has been announced as End of Life on 30 June 2018.
So we should upgrade tomcat to 8.5.x.