README.md in influxdb-rails-1.0.1.beta1

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 ## Requirements
 
 To be able to measure performance you need the following things available:
 
-- [InfluxDB 1.x](https://docs.influxdata.com/influxdb/v1.7/introduction/installation/)
+- [InfluxDB 1.x](https://docs.influxdata.com/influxdb/v1.8/introduction/install/)
 - [Grafana](https://grafana.com/docs/)
 - A [Ruby On Rails](https://rubyonrails.org/) application with [influxdb-rails](https://github.com/influxdata/influxdb-rails) enabled
 
 ## Installation
 