How to read the rotated logs by logstash

I have a logstash configuration to read the log files as follow.

file {
type => "serverlog"
path => ["////guvctapfil03.bravurasolutions.local//LOG_DIR//server.log"]
start_position => "beginning"

Now at 00:00:00 AM every morning my server.log is renamed to server.log.1 and new file named server.logn is created and it seems my logstash is not reading the server.log.

Am i missing something in my configuration or how should we handle this log rotation under logstash configuration.

I am using logstash-2.3.4

Vinay Kumar