diff --git a/redstring/parser.py b/redstring/parser.py
index 8025c70..87c9ae6 100644
--- a/redstring/parser.py
+++ b/redstring/parser.py
@@ -328,7 +328,7 @@ def dump(doc: Document, fd: IO):
     Write a document to a file descriptor.
     """
     dumped_json = doc.to_json()
-    json.dump(dumped_json, fd)
+    json.dump(dumped_json, fd, indent=2)
 
 
 #