diff --git a/src/io.py b/src/io.py
index 40e846e..4194603 100644
--- a/src/io.py
+++ b/src/io.py
@@ -93,9 +93,15 @@ def write_path_steps(path: "Path", output_path: str) -> None:
         lines.append(" {")
         lines.append(f'  "step": {step_idx},')
 
+        lines.append(
+            f'  "source_node": {_format_chord_line(step.source_node.pitches)},'
+        )
         lines.append(
             f'  "source_chord": {_format_chord_line(step.source_chord.pitches)},'
         )
+        lines.append(
+            f'  "destination_node": {_format_chord_line(step.destination_node.pitches)},'
+        )
         lines.append(
             f'  "destination_chord": {_format_chord_line(step.destination_chord.pitches)},'
         )