diff --git a/singer_sdk/helpers/types.py b/singer_sdk/helpers/types.py
index 783dbe914..715f5309a 100644
--- a/singer_sdk/helpers/types.py
+++ b/singer_sdk/helpers/types.py
@@ -20,5 +20,5 @@
     "Record",
 ]
 
-Context: TypeAlias = Mapping
+Context: TypeAlias = Mapping[str, t.Any]
 Record: TypeAlias = t.Dict[str, t.Any]