increase replication factor of a topic

[Nikhil Bhaware]

Hi,
I have 6 node kafka cluster on which i created topic with 3
replication-factor and 1000 partitions.now i want to increase replication
factor.
is there any way i can increase replication factor to 5?
using kafka 0.8.2.1
-- 
Regards ,
Nikhil Bhaware
M.Tech (CSE)
NIT Warangal,India