With the stock bridge, you would have to raise the bridge.
There are a few other options though..
1) Lower the Tail Peice all the way down to increase the string tension. Also check the relief on your neck. Perhaps you need to adjust your truss rod a 1/4 turn.
2) You could get a Warmoth Modified Mustang Bridge. Its a Mustang bridge that allows you to raise the saddles individually. A $47.50 fix
Here is a link to this...http://www.warmoth.com/Modified-Mustang-Bridge-Chrome-P616.aspx
3) You can get a Mastery Bridge. This is the king of all bridges for Mustangs/Jazzmasters/Jaguars/Jag-Stangs but very Pricey at $200
Here is a link to this...http://www.masterybridge.com/