diff --git a/mypy_stubs/typing_inspect/__init__.pyi b/mypy_stubs/typing_inspect/__init__.pyi
index ac043787..a868926f 100644
--- a/mypy_stubs/typing_inspect/__init__.pyi
+++ b/mypy_stubs/typing_inspect/__init__.pyi
@@ -1,4 +1,5 @@
 import typing as t
 
 def is_optional_type(typ: t.Any) -> bool: ...
+def is_typevar(typ: t.Any) -> bool: ...
 def get_args(typ: t.Any) -> tuple: ...
diff --git a/src/saturn_engine/utils/config.py b/src/saturn_engine/utils/config.py
index 044997ba..11a2337e 100644
--- a/src/saturn_engine/utils/config.py
+++ b/src/saturn_engine/utils/config.py
@@ -11,6 +11,8 @@
 from collections.abc import Mapping
 from enum import Enum
 
+import typing_inspect
+
 from . import CINamespace
 from .inspect import eval_class_annotations
 from .inspect import import_name
@@ -55,7 +57,7 @@ def load_envvar(self: TConfig, envvar: str) -> TConfig:
         """Load an object from a path stored in an environment variable."""
         return self.load_object(os.environ.get(envvar))
 
-    def register_interface(self: TConfig, namespace: str, interface: Type) -> TConfig:
+    def register_interface(self: TConfig, namespace: str, interface: Any) -> TConfig:
         """Add an interface to the config under namespace.
 
         Interfaces are used to validate config keys and values.
@@ -252,6 +254,9 @@ def check_type(obj: Any, typ: Any, scope: Any) -> bool:
     if typ is float:
         return isinstance(obj, (float, int))
 
+    if typing_inspect.is_typevar(typ):
+        return True
+
     if not isinstance(obj, typ):
         return False
 
diff --git a/src/saturn_engine/worker/services/manager.py b/src/saturn_engine/worker/services/manager.py
index c08b3a58..4169830e 100644
--- a/src/saturn_engine/worker/services/manager.py
+++ b/src/saturn_engine/worker/services/manager.py
@@ -17,6 +17,7 @@
 class ServicesManager:
     def __init__(self, config: Config) -> None:
         self.strict = config.c.services_manager.strict_services
+        config = config.register_interface(Hooks.name, Hooks.Options())
         self.services: Services = ServicesNamespace(
             config=config,
             hooks=Hooks.from_options(config.r.get("hooks", {})),