diff --git a/main.py b/main.py
index 260336a..67679e3 100644
--- a/main.py
+++ b/main.py
@@ -19,7 +19,7 @@ os.remove(str(c.transparent_surfaces_path))
 constructions = dict(opaque_surfaces=opaque['opaque_surfaces'], transparent_surfaces=transparent['transparent_surfaces'])
 
 with open(c.nrcan_constructions, 'w') as f:
-  json.dump(constructions, f)
+  json.dump(constructions, f, indent=2)
 
 
 print('NRCAN catalog successfully created')