diff --git a/README.md b/README.md
index 9e3bcae..8cc4f56 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,8 @@ the number of concurrent tube stats workers via the
 
 ## Usage
 
-Running beanstalkd_exporter is as easy as executing `beanstalkd_exporter` on the command line. Two arguments are required: `-config` and `-mapping-config` (see below for what they need).
+
+Running beanstalkd_exporter is as easy as executing `beanstalkd_exporter` on the command line. One argument is required: `-mapping-config` (see below for what it needs).
 
 ```bash
 $ beanstalkd_exporter -config examples/servers.conf -mapping-config examples/mapping.conf