What version of photoshop and operating system are you using?
Usually from within photoshop cs6,cc or cc 2014, one can go to Help>Updates and get camera raw 8.5 for photoshop.
Sorry. Meant to include: OSX 10.9.3, CS6 PS Extended, LR5. Thanks.
You should do Help / Updates from within PS CS6 to update your ACR plug-in to 8.5, then everything will be in sync.
If that doesn't work, you can try using the direct download links for the installer CS6/ACR8.5 at: