diff --git a/codearchiver/storage.py b/codearchiver/storage.py
index 23f9dd3..3d7aae5 100644
--- a/codearchiver/storage.py
+++ b/codearchiver/storage.py
@@ -75,7 +75,11 @@ class DirectoryStorage(Storage):
 
 	def search_metadata(self, criteria):
 		_logger.info(f'Searching metadata by criteria: {criteria!r}')
-		for metadataFilename in glob.glob('*.codearchiver-metadata', root_dir = self._directory):
+		# Replace this with `root_dir` when dropping Python 3.9 support
+		escapedDirPrefix = os.path.join(glob.escape(self._directory), '')
+		escapedDirPrefixLen = len(escapedDirPrefix)
+		for metadataFilename in glob.glob(f'{escapedDirPrefix}*.codearchiver-metadata'):
+			metadataFilename = metadataFilename[escapedDirPrefixLen:]
 			_logger.info(f'Searching metadata {metadataFilename}')
 			with self.open(metadataFilename, 'r') as fp:
 				idx = codearchiver.core.Metadata.deserialise(fp, validate = False)