diff --git a/src/argh/decorators.py b/src/argh/decorators.py
index 0de1c98..69da401 100644
--- a/src/argh/decorators.py
+++ b/src/argh/decorators.py
@@ -52,7 +52,7 @@ def wrapper(func: Callable) -> Callable:
     return wrapper
 
 
-def aliases(*names: List[str]) -> Callable:
+def aliases(*names: str) -> Callable:
     """
     Defines alternative command name(s) for given function (along with its
     original name). Usage::