diff --git a/requirements-linting.txt b/requirements-linting.txt
index 3b88581e24..d2a65b31db 100644
--- a/requirements-linting.txt
+++ b/requirements-linting.txt
@@ -14,3 +14,4 @@ loguru # There is no separate types module.
 flake8-bugbear
 pep8-naming
 pre-commit # local linting
+httpcore
diff --git a/sentry_sdk/integrations/__init__.py b/sentry_sdk/integrations/__init__.py
index 6c24ca1625..32528246af 100644
--- a/sentry_sdk/integrations/__init__.py
+++ b/sentry_sdk/integrations/__init__.py
@@ -14,6 +14,7 @@
     from typing import Optional
     from typing import Set
     from typing import Type
+    from typing import Union
 
 
 _DEFAULT_FAILED_REQUEST_STATUS_CODES = frozenset(range(500, 600))
@@ -124,7 +125,7 @@ def setup_integrations(
     with_auto_enabling_integrations=False,
     disabled_integrations=None,
 ):
-    # type: (Sequence[Integration], bool, bool, Optional[Sequence[Integration]]) -> Dict[str, Integration]
+    # type: (Sequence[Integration], bool, bool, Optional[Sequence[Union[type[Integration], Integration]]]) -> Dict[str, Integration]
     """
     Given a list of integration instances, this installs them all.