diff --git a/gql/transport/requests.py b/gql/transport/requests.py
index 0c6eb3fc..fd9759ed 100644
--- a/gql/transport/requests.py
+++ b/gql/transport/requests.py
@@ -381,7 +381,9 @@ def _extract_response(self, response: requests.Response) -> Any:
                 log.info("<<< %s", response.text)
 
         except requests.HTTPError as e:
-            raise TransportServerError(str(e), e.response.status_code) from e
+            raise TransportServerError(
+                str(e), e.response.status_code if e.response is not None else None
+            ) from e
 
         except Exception:
             self._raise_invalid_result(str(response.text), "Not a JSON answer")
diff --git a/setup.py b/setup.py
index 773aacc5..0a2fd418 100644
--- a/setup.py
+++ b/setup.py
@@ -29,7 +29,7 @@
     "check-manifest>=0.42,<1",
     "flake8==3.8.1",
     "isort==4.3.21",
-    "mypy==0.910",
+    "mypy==1.10",
     "sphinx>=5.3.0,<6",
     "sphinx_rtd_theme>=0.4,<1",
     "sphinx-argparse==0.2.5",