diff --git a/conf/config.sample.yml b/conf/config.sample.yml
index a66d250..d071523 100644
--- a/conf/config.sample.yml
+++ b/conf/config.sample.yml
@@ -8,7 +8,7 @@
 # Port the server should listen to
 # ---------------------------------------------------------------------
 
-port: 3000
+port: __PORT__
 
 # ---------------------------------------------------------------------
 # IP address the server should listen to