diff --git a/baretypes/types.py b/baretypes/types.py
index 5afd4a8..839c05e 100644
--- a/baretypes/types.py
+++ b/baretypes/types.py
@@ -109,6 +109,7 @@ async def close(self, code: int = 1000) -> None:
 ]
 HttpResponse = Union[
     int,
+    Tuple[int],
     Tuple[int, Optional[Headers]],
     Tuple[int, Optional[Headers], Optional[Content]],
     HttpFullResponse
diff --git a/pyproject.toml b/pyproject.toml
index a0f3a09..b80f9d0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "baretypes"
-version = "3.3.0"
+version = "3.3.1"
 description = "Types for bareASGI and bareClient"
 authors = ["Rob Blackbourn <rob.blackbourn@gmail.com>"]
 license = "Apache-2.0"