diff --git a/gitlab/cli.py b/gitlab/cli.py
index a3ff5b5b4..ca4734190 100644
--- a/gitlab/cli.py
+++ b/gitlab/cli.py
@@ -107,7 +107,7 @@ def gitlab_resource_to_cls(
     return class_type
 
 
-def cls_to_gitlab_resource(cls: RESTObject) -> str:
+def cls_to_gitlab_resource(cls: type[RESTObject]) -> str:
     dasherized_uppercase = camel_upperlower_regex.sub(r"\1-\2", cls.__name__)
     dasherized_lowercase = camel_lowerupper_regex.sub(r"\1-\2", dasherized_uppercase)
     return dasherized_lowercase.lower()
diff --git a/gitlab/v4/cli.py b/gitlab/v4/cli.py
index 067a0a155..87fcaf261 100644
--- a/gitlab/v4/cli.py
+++ b/gitlab/v4/cli.py
@@ -394,7 +394,7 @@ def extend_parser(parser: argparse.ArgumentParser) -> argparse.ArgumentParser:
     subparsers.required = True
 
     # populate argparse for all Gitlab Object
-    classes = set()
+    classes: set[type[gitlab.base.RESTObject]] = set()
     for cls in gitlab.v4.objects.__dict__.values():
         if not isinstance(cls, type):
             continue
diff --git a/requirements-lint.txt b/requirements-lint.txt
index 0620fc57d..c8006e667 100644
--- a/requirements-lint.txt
+++ b/requirements-lint.txt
@@ -4,7 +4,7 @@ black==25.1.0
 commitizen==4.8.2
 flake8==7.2.0
 isort==6.0.1
-mypy==1.15.0
+mypy==1.16.0
 pylint==3.3.7
 pytest==8.3.5
 responses==0.25.7
diff --git a/tests/unit/test_cli.py b/tests/unit/test_cli.py
index af3dd3380..cad27afba 100644
--- a/tests/unit/test_cli.py
+++ b/tests/unit/test_cli.py
@@ -161,7 +161,7 @@ def error(self, message):
             "Raise error instead of exiting on invalid arguments, to make testing easier"
             raise ValueError(message)
 
-    class Fake:
+    class Fake(gitlab.base.RESTObject):
         _id_attr = None
 
     class FakeManager(CreateMixin, UpdateMixin, gitlab.base.RESTManager):