diff --git a/stix2/datastore/filesystem.py b/stix2/datastore/filesystem.py
index 1d69e7d..a07754a 100644
--- a/stix2/datastore/filesystem.py
+++ b/stix2/datastore/filesystem.py
@@ -529,7 +529,7 @@ class FileSystemSource(DataSource):
         all_data = self.all_versions(stix_id, version=version, _composite_filters=_composite_filters)
 
         if all_data:
-            stix_obj = sorted(all_data, key=lambda k: k['modified'])[0]
+            stix_obj = sorted(all_data, key=lambda k: k['modified'])[-1]
         else:
             stix_obj = None