diff --git a/modules/apg/pipeline_stable_cascade_prior_apg.py b/modules/apg/pipeline_stable_cascade_prior_apg.py
index 6ffaf8089..c4747612d 100644
--- a/modules/apg/pipeline_stable_cascade_prior_apg.py
+++ b/modules/apg/pipeline_stable_cascade_prior_apg.py
@@ -372,7 +372,7 @@ class StableCascadePriorPipelineAPG(DiffusionPipeline):
         height: int = 1024,
         width: int = 1024,
         num_inference_steps: int = 20,
-        timesteps: list[float] = None,
+        timesteps: list[float] | None = None,
         guidance_scale: float = 4.0,
         negative_prompt: str | list[str] | None = None,
         prompt_embeds: torch.Tensor | None = None,
@@ -386,7 +386,7 @@ class StableCascadePriorPipelineAPG(DiffusionPipeline):
         output_type: str | None = "pt",
         return_dict: bool = True,
         callback_on_step_end: Callable[[int, int, dict], None] | None = None,
-        callback_on_step_end_tensor_inputs: list[str] = None,
+        callback_on_step_end_tensor_inputs: list[str] | None = None,
     ):
         """
         Function invoked when calling the pipeline for generation.
diff --git a/modules/apg/pipeline_stable_diffision_xl_apg.py b/modules/apg/pipeline_stable_diffision_xl_apg.py
index b09ae242f..5da74c299 100644
--- a/modules/apg/pipeline_stable_diffision_xl_apg.py
+++ b/modules/apg/pipeline_stable_diffision_xl_apg.py
@@ -793,13 +793,13 @@ class StableDiffusionXLPipelineAPG(
     @replace_example_docstring(EXAMPLE_DOC_STRING)
     def __call__(
         self,
-        prompt: str | list[str] = None,
+        prompt: str | list[str] | None = None,
         prompt_2: str | list[str] | None = None,
         height: int | None = None,
         width: int | None = None,
         num_inference_steps: int = 50,
-        timesteps: list[int] = None,
-        sigmas: list[float] = None,
+        timesteps: list[int] | None = None,
+        sigmas: list[float] | None = None,
         denoising_end: float | None = None,
         guidance_scale: float = 5.0,
         negative_prompt: str | list[str] | None = None,
@@ -826,7 +826,7 @@ class StableDiffusionXLPipelineAPG(
         negative_target_size: tuple[int, int] | None = None,
         clip_skip: int | None = None,
         callback_on_step_end: Callable[[int, int, dict], None] | PipelineCallback | MultiPipelineCallbacks | None = None,
-        callback_on_step_end_tensor_inputs: list[str] = None,
+        callback_on_step_end_tensor_inputs: list[str] | None = None,
         **kwargs,
     ):
         r"""
diff --git a/modules/apg/pipeline_stable_diffusion_apg.py b/modules/apg/pipeline_stable_diffusion_apg.py
index ae1eb26e0..57aebafca 100644
--- a/modules/apg/pipeline_stable_diffusion_apg.py
+++ b/modules/apg/pipeline_stable_diffusion_apg.py
@@ -749,12 +749,12 @@ class StableDiffusionPipelineAPG(
     @replace_example_docstring(EXAMPLE_DOC_STRING)
     def __call__(
         self,
-        prompt: str | list[str] = None,
+        prompt: str | list[str] | None = None,
         height: int | None = None,
         width: int | None = None,
         num_inference_steps: int = 50,
-        timesteps: list[int] = None,
-        sigmas: list[float] = None,
+        timesteps: list[int] | None = None,
+        sigmas: list[float] | None = None,
         guidance_scale: float = 7.5,
         negative_prompt: str | list[str] | None = None,
         num_images_per_prompt: int | None = 1,
@@ -771,7 +771,7 @@ class StableDiffusionPipelineAPG(
         guidance_rescale: float = 0.0,
         clip_skip: int | None = None,
         callback_on_step_end: Callable[[int, int, dict], None] | PipelineCallback | MultiPipelineCallbacks | None = None,
-        callback_on_step_end_tensor_inputs: list[str] = None,
+        callback_on_step_end_tensor_inputs: list[str] | None = None,
         **kwargs,
     ):
         r"""