diff --git a/README.md b/README.md
index b6d6535b..4ac81597 100644
--- a/README.md
+++ b/README.md
@@ -1,10 +1,10 @@
 Added support for system commands at print start, print end, print cancelled and z-height change.  Add the commands to run to the config.yaml file:
 
-system_commands:
-  cancelled: echo cancelled _FILE_ at _PROGRESS_ percent done.
-  print_done: growlnotify "done with _FILE_"
-  print_started: echo starting _FILE_  
-  z_change: echo _LINE_ _PROGRESS_ _ZHEIGHT_
+    system_commands:
+      cancelled: echo cancelled _FILE_ at _PROGRESS_ percent done.
+      print_done: growlnotify "done with _FILE_"
+      print_started: echo starting _FILE_
+      z_change: echo _LINE_ _PROGRESS_ _ZHEIGHT_
 
 These commands take the tokens take _FILE_, _PERCENT_, _LINES_ and _ZHEIGHT_ which will be passed to external commands.