diff --git a/swh/web/common/typing.py b/swh/web/common/typing.py
--- a/swh/web/common/typing.py
+++ b/swh/web/common/typing.py
@@ -54,7 +54,7 @@
     """directory associated to branch heading revision"""
     message: Optional[str]
     """message of branch heading revision"""
-    name: Optional[str]
+    name: str
     """branch name"""
     revision: str
     """branch heading revision"""