diff --git a/mdrsclient/commands/file_metadata.py b/mdrsclient/commands/file_metadata.py
index bef099c..d419fd8 100644
--- a/mdrsclient/commands/file_metadata.py
+++ b/mdrsclient/commands/file_metadata.py
@@ -1,3 +1,4 @@
+import json
 import os
 from argparse import Namespace, _SubParsersAction
 
@@ -28,4 +29,4 @@ class FileMetadataCommand(BaseCommand):
             raise IllegalArgumentException(f"File `{r_basename}` not found.")
         file_api = FileApi(connection)
         metadata = file_api.metadata(file)
-        print(metadata)
+        print(json.dumps(metadata))
diff --git a/mdrsclient/commands/metadata.py b/mdrsclient/commands/metadata.py
index c3fcdda..5d21512 100644
--- a/mdrsclient/commands/metadata.py
+++ b/mdrsclient/commands/metadata.py
@@ -1,3 +1,4 @@
+import json
 from argparse import Namespace, _SubParsersAction
 
 from mdrsclient.api import FolderApi
@@ -20,4 +21,4 @@ class MetadataCommand(BaseCommand):
         folder = self._find_folder(connection, laboratory, r_path, args.password)
         folder_api = FolderApi(connection)
         metadata = folder_api.metadata(folder.id)
-        print(metadata)
+        print(json.dumps(metadata))