diff --git a/aqt/metadata.py b/aqt/metadata.py
index e3941fa9..a00bea91 100644
--- a/aqt/metadata.py
+++ b/aqt/metadata.py
@@ -37,7 +37,14 @@
 from semantic_version import Version as SemanticVersion
 from texttable import Texttable
 
-from aqt.exceptions import ArchiveConnectionError, ArchiveDownloadError, ArchiveListError, CliInputError, EmptyMetadata, ChecksumDownloadFailure
+from aqt.exceptions import (
+    ArchiveConnectionError,
+    ArchiveDownloadError,
+    ArchiveListError,
+    CliInputError,
+    EmptyMetadata,
+    ChecksumDownloadFailure,
+)
 from aqt.helper import Settings, get_hash, getUrl, xml_to_modules
 
 
@@ -562,6 +569,7 @@ def known_extensions(version: Version) -> List[str]:
             return ["qtpdf", "qtwebengine"]
         return []
 
+
 class MetadataFactory:
     """Retrieve metadata of Qt variations, versions, and descriptions from Qt site."""