diff --git a/steps/create_workflow_input.cwl b/steps/create_workflow_input.cwl
index 386de100034cd8518db7639ce2a9a65a0c1b1693..505eecf6aa537f5e59391e59a1e3d46f7deaec71 100644
--- a/steps/create_workflow_input.cwl
+++ b/steps/create_workflow_input.cwl
@@ -39,4 +39,4 @@ requirements:
               rendered_leafs.append(rendered_leaf)  
             
           with open('workflow_input.json', 'w') as fp:
-              json.dump({'msin': rendered_leafs}, fp)
\ No newline at end of file
+              json.dump({'msin': rendered_leafs}, fp, indent=4)
\ No newline at end of file