diff --git a/examples/balancing-client.rb b/examples/balancing-client.rb
index e7aa38c..8962965 100755
--- a/examples/balancing-client.rb
+++ b/examples/balancing-client.rb
@@ -1,5 +1,7 @@
 # A simple HTTP client, which sends multiple requests to the proxy server
 
+#!/usr/bin/env ruby
+
 require 'net/http'
 
 proxy = Net::HTTP::Proxy('0.0.0.0', '9999')