For future reference please do try and list what platform/console you are playing on.
Now if this in regards to the PC update. There was one just pushed last night. If you are playing through steam, the update will occur automatically.
Hope this helps!
Update notes can be found here Ghosts Title Update and Hot Fix Notes (8/4/14) . If you are still having issues, here are some additional tips you may want to try Call of Duty: Ghosts - C - Knowledge Base - Steam Support .