diff --git a/ptvp35/__init__.py b/ptvp35/__init__.py
index d67831b..b14f0e3 100644
--- a/ptvp35/__init__.py
+++ b/ptvp35/__init__.py
@@ -301,3 +301,10 @@ class Db(DbFactory, DbConnection):
     def __init__(self, path: str | pathlib.Path, *, kvrequest_type: Type[KVRequest], buffersize=1048576):
         DbFactory.__init__(self, path, kvrequest_type=kvrequest_type, buffersize=buffersize)
         DbConnection.__init__(self, self)
+
+    async def __aenter__(self):
+        await self._initialize()
+        return self
+
+    async def __aexit__(self, exc_type, exc_val, exc_tb):
+        await self.aclose()