Playerglobal swc version updates

Right now my development/build environment is using version 11.5 of the playerglobal.swc.  That is also what the documentation calls for.  


There is an 11.9 version available.  Is there a way to update things to use this newer version?  Does it matter, would anything be gained by updating?    


I ask because it was brought up to me by some IT people who maintain our build systems that there is a newer version.