diff --git a/stpt_pipeline/schema.py b/stpt_pipeline/schema.py
index b856aefdc5233e807bf516e18b3616742c03b5f0..a3e8b2d2e6d5a537910167f9bb4e1aa8e90ee2a9 100644
--- a/stpt_pipeline/schema.py
+++ b/stpt_pipeline/schema.py
@@ -1,3 +1,9 @@
 import voluptuous as vo
 
-schema = vo.Schema({vo.Required('datalen'): vo.Range(1, 1000)})
+schema = vo.Schema(
+    {
+        vo.Required('root_dir'): str,
+        vo.Required('output_dir'): str,
+        vo.Required('flat_file'): str,
+    }
+)