Update Tomcat 7 to Tomcat 7.0.50 in BO4.1

Dear All,

Due to some Security reasons we are planning to update from Tomcat7 to Tomcat 7.0.50.

Note: Currently we are using default tomcat7 which is coming  from BO4.1 Installation.

Environment:BO4.1 Sp2

Windows 2008.

Can any one please provide steps how to update Tomcat from 7 to 7.0.50.

Thanks in advance

Kumar