README.md in polyn-cli-0.1.5 vs README.md in polyn-cli-0.1.6

@@ -32,9 +32,10 @@
 
 ## Environment Variables
 
 * `NATS_SERVERS` - locations of your servers (defaults to localhost)
 * `NATS_CREDENTIALS` - path to nats credentials file
+* `NATS_CA_FILE` - Fully Qualified Path to a file containing Root CA (PEM format). Use when the server has certs signed by an unknown authority.
 * `POLYN_ENV` - type of environment (defaults to "development")
 
 ## Development
 
 After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake spec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.