diff --git a/api/dev-requirements.txt b/api/dev-requirements.txt
new file mode 100644
index 00000000..c13ad788
--- /dev/null
+++ b/api/dev-requirements.txt
@@ -0,0 +1,6 @@
+mypy
+
+types-Flask-Cors
+types-jsonschema
+types-Pillow
+types-PyYAML
\ No newline at end of file
diff --git a/api/onnx_web/chain/base.py b/api/onnx_web/chain/base.py
index b01e46b0..93f48c12 100644
--- a/api/onnx_web/chain/base.py
+++ b/api/onnx_web/chain/base.py
@@ -28,6 +28,7 @@ logger = getLogger(__name__)
 class StageCallback(Protocol):
     def __call__(
         self,
+        job: JobContext,
         ctx: ServerContext,
         stage: StageParams,
         params: ImageParams,
@@ -83,7 +84,7 @@ class ChainPipeline:
                             stage_params.tile_size)
 
                 def stage_tile(tile: Image.Image, _dims) -> Image.Image:
-                    tile = stage_pipe(server, stage_params, params, tile,
+                    tile = stage_pipe(job, server, stage_params, params, tile,
                                       **kwargs)
 
                     if is_debug():
@@ -95,7 +96,7 @@ class ChainPipeline:
                     image, stage_params.tile_size, stage_params.outscale, [stage_tile])
             else:
                 logger.info('image within tile size, running stage')
-                image = stage_pipe(server, stage_params, params, image,
+                image = stage_pipe(job, server, stage_params, params, image,
                                    **kwargs)
 
             logger.info('finished stage %s, result size: %sx%s',
diff --git a/api/onnx_web/chain/blend_img2img.py b/api/onnx_web/chain/blend_img2img.py
index 9078e63c..ae6b4dcc 100644
--- a/api/onnx_web/chain/blend_img2img.py
+++ b/api/onnx_web/chain/blend_img2img.py
@@ -4,6 +4,9 @@ from diffusers import (
 from logging import getLogger
 from PIL import Image
 
+from ..device_pool import (
+    JobContext,
+)
 from ..diffusion.load import (
     load_pipeline,
 )
@@ -21,7 +24,8 @@ logger = getLogger(__name__)
 
 
 def blend_img2img(
-    _ctx: ServerContext,
+    job: JobContext,
+    _server: ServerContext,
     _stage: StageParams,
     params: ImageParams,
     source_image: Image.Image,
@@ -34,7 +38,7 @@ def blend_img2img(
     logger.info('generating image using img2img, %s steps: %s', params.steps, prompt)
 
     pipe = load_pipeline(OnnxStableDiffusionImg2ImgPipeline,
-                            params.model, params.provider, params.scheduler)
+                            params.model, params.scheduler, job.get_device())
 
     rng = np.random.RandomState(params.seed)
 
diff --git a/api/onnx_web/chain/blend_inpaint.py b/api/onnx_web/chain/blend_inpaint.py
index 847f1ffb..3eaccc0b 100644
--- a/api/onnx_web/chain/blend_inpaint.py
+++ b/api/onnx_web/chain/blend_inpaint.py
@@ -5,6 +5,9 @@ from logging import getLogger
 from PIL import Image
 from typing import Callable, Tuple
 
+from ..device_pool import (
+    JobContext,
+)
 from ..diffusion.load import (
     get_latents_from_seed,
     load_pipeline,
@@ -38,7 +41,8 @@ logger = getLogger(__name__)
 
 
 def blend_inpaint(
-    ctx: ServerContext,
+    job: JobContext,
+    server: ServerContext,
     stage: StageParams,
     params: ImageParams,
     source_image: Image.Image,
@@ -65,9 +69,9 @@ def blend_inpaint(
         mask_filter=mask_filter)
 
     if is_debug():
-        save_image(ctx, 'last-source.png', source_image)
-        save_image(ctx, 'last-mask.png', mask_image)
-        save_image(ctx, 'last-noise.png', noise_image)
+        save_image(server, 'last-source.png', source_image)
+        save_image(server, 'last-mask.png', mask_image)
+        save_image(server, 'last-noise.png', noise_image)
 
     def outpaint(image: Image.Image, dims: Tuple[int, int, int]):
         left, top, tile = dims
@@ -75,11 +79,11 @@ def blend_inpaint(
         mask = mask_image.crop((left, top, left + tile, top + tile))
 
         if is_debug():
-            save_image(ctx, 'tile-source.png', image)
-            save_image(ctx, 'tile-mask.png', mask)
+            save_image(server, 'tile-source.png', image)
+            save_image(server, 'tile-mask.png', mask)
 
         pipe = load_pipeline(OnnxStableDiffusionInpaintPipeline,
-                             params.model, params.provider, params.scheduler)
+                             params.model, params.scheduler, job.get_device())
 
         latents = get_latents_from_seed(params.seed, size)
         rng = np.random.RandomState(params.seed)
diff --git a/api/onnx_web/chain/correct_gfpgan.py b/api/onnx_web/chain/correct_gfpgan.py
index 147d32c2..6dcbfbea 100644
--- a/api/onnx_web/chain/correct_gfpgan.py
+++ b/api/onnx_web/chain/correct_gfpgan.py
@@ -5,6 +5,9 @@ from PIL import Image
 from realesrgan import RealESRGANer
 from typing import Optional
 
+from ..device_pool import (
+    JobContext,
+)
 from ..params import (
     ImageParams,
     StageParams,
@@ -60,7 +63,8 @@ def load_gfpgan(ctx: ServerContext, upscale: UpscaleParams, upsampler: Optional[
 
 
 def correct_gfpgan(
-    ctx: ServerContext,
+    _job: JobContext,
+    server: ServerContext,
     _stage: StageParams,
     _params: ImageParams,
     source_image: Image.Image,
@@ -74,7 +78,7 @@ def correct_gfpgan(
         return source_image
 
     logger.info('correcting faces with GFPGAN model: %s', upscale.correction_model)
-    gfpgan = load_gfpgan(ctx, upscale, upsampler=upsampler)
+    gfpgan = load_gfpgan(server, upscale, upsampler=upsampler)
 
     output = np.array(source_image)
     _, _, output = gfpgan.enhance(
diff --git a/api/onnx_web/chain/persist_disk.py b/api/onnx_web/chain/persist_disk.py
index fb426850..b9495352 100644
--- a/api/onnx_web/chain/persist_disk.py
+++ b/api/onnx_web/chain/persist_disk.py
@@ -1,6 +1,9 @@
 from logging import getLogger
 from PIL import Image
 
+from ..device_pool import (
+    JobContext,
+)
 from ..params import (
     ImageParams,
     StageParams,
@@ -16,6 +19,7 @@ logger = getLogger(__name__)
 
 
 def persist_disk(
+    _job: JobContext,
     ctx: ServerContext,
     _stage: StageParams,
     _params: ImageParams,
diff --git a/api/onnx_web/chain/persist_s3.py b/api/onnx_web/chain/persist_s3.py
index d54f4a93..1fd966fb 100644
--- a/api/onnx_web/chain/persist_s3.py
+++ b/api/onnx_web/chain/persist_s3.py
@@ -5,6 +5,9 @@ from io import BytesIO
 from logging import getLogger
 from PIL import Image
 
+from ..device_pool import (
+    JobContext,
+)
 from ..params import (
     ImageParams,
     StageParams,
diff --git a/api/onnx_web/chain/reduce_crop.py b/api/onnx_web/chain/reduce_crop.py
index 3e3a5f96..ca21ae02 100644
--- a/api/onnx_web/chain/reduce_crop.py
+++ b/api/onnx_web/chain/reduce_crop.py
@@ -1,6 +1,9 @@
 from logging import getLogger
 from PIL import Image
 
+from ..device_pool import (
+    JobContext,
+)
 from ..params import (
     ImageParams,
     Size,
diff --git a/api/onnx_web/chain/reduce_thumbnail.py b/api/onnx_web/chain/reduce_thumbnail.py
index 8c3f0e19..02498daa 100644
--- a/api/onnx_web/chain/reduce_thumbnail.py
+++ b/api/onnx_web/chain/reduce_thumbnail.py
@@ -1,6 +1,9 @@
 from logging import getLogger
 from PIL import Image
 
+from ..device_pool import (
+    JobContext,
+)
 from ..params import (
     ImageParams,
     Size,
diff --git a/api/onnx_web/chain/source_noise.py b/api/onnx_web/chain/source_noise.py
index 33c6c226..8bd360dc 100644
--- a/api/onnx_web/chain/source_noise.py
+++ b/api/onnx_web/chain/source_noise.py
@@ -2,6 +2,9 @@ from logging import getLogger
 from PIL import Image
 from typing import Callable
 
+from ..device_pool import (
+    JobContext,
+)
 from ..params import (
     ImageParams,
     Size,
diff --git a/api/onnx_web/chain/source_txt2img.py b/api/onnx_web/chain/source_txt2img.py
index 4ae06580..e72fba37 100644
--- a/api/onnx_web/chain/source_txt2img.py
+++ b/api/onnx_web/chain/source_txt2img.py
@@ -4,6 +4,9 @@ from diffusers import (
 from logging import getLogger
 from PIL import Image
 
+from ..device_pool import (
+    JobContext,
+)
 from ..diffusion.load import (
     get_latents_from_seed,
     load_pipeline,
@@ -23,7 +26,8 @@ logger = getLogger(__name__)
 
 
 def source_txt2img(
-    ctx: ServerContext,
+    job: JobContext,
+    server: ServerContext,
     stage: StageParams,
     params: ImageParams,
     source_image: Image.Image,
@@ -39,7 +43,7 @@ def source_txt2img(
         logger.warn('a source image was passed to a txt2img stage, but will be discarded')
 
     pipe = load_pipeline(OnnxStableDiffusionPipeline,
-                            params.model, params.provider, params.scheduler)
+                            params.model, params.scheduler, job.get_device())
 
     latents = get_latents_from_seed(params.seed, size)
     rng = np.random.RandomState(params.seed)
diff --git a/api/onnx_web/chain/upscale_outpaint.py b/api/onnx_web/chain/upscale_outpaint.py
index 254f2c03..8e1f29c2 100644
--- a/api/onnx_web/chain/upscale_outpaint.py
+++ b/api/onnx_web/chain/upscale_outpaint.py
@@ -5,6 +5,9 @@ from logging import getLogger
 from PIL import Image, ImageDraw
 from typing import Callable, Tuple
 
+from ..device_pool import (
+    JobContext,
+)
 from ..diffusion.load import (
     get_latents_from_seed,
     get_tile_latents,
diff --git a/api/onnx_web/chain/upscale_resrgan.py b/api/onnx_web/chain/upscale_resrgan.py
index be862d95..3a030dbd 100644
--- a/api/onnx_web/chain/upscale_resrgan.py
+++ b/api/onnx_web/chain/upscale_resrgan.py
@@ -4,10 +4,14 @@ from os import path
 from PIL import Image
 from realesrgan import RealESRGANer
 
+from ..device_pool import (
+    JobContext,
+)
 from ..onnx import (
     OnnxNet,
 )
 from ..params import (
+    DeviceParams,
     ImageParams,
     StageParams,
     UpscaleParams,
@@ -25,7 +29,7 @@ last_pipeline_instance = None
 last_pipeline_params = (None, None)
 
 
-def load_resrgan(ctx: ServerContext, params: UpscaleParams, tile=0):
+def load_resrgan(ctx: ServerContext, params: UpscaleParams, device: DeviceParams, tile=0):
     global last_pipeline_instance
     global last_pipeline_params
 
@@ -41,7 +45,7 @@ def load_resrgan(ctx: ServerContext, params: UpscaleParams, tile=0):
 
     # use ONNX acceleration, if available
     if params.format == 'onnx':
-        model = OnnxNet(ctx, model_file, provider=params.provider)
+        model = OnnxNet(ctx, model_file, provider=device.provider, sess_options=device.options)
     elif params.format == 'pth':
         model = RRDBNet(num_in_ch=3, num_out_ch=3, num_feat=64,
                         num_block=23, num_grow_ch=32, scale=params.scale)
@@ -76,7 +80,8 @@ def load_resrgan(ctx: ServerContext, params: UpscaleParams, tile=0):
 
 
 def upscale_resrgan(
-    ctx: ServerContext,
+    job: JobContext,
+    server: ServerContext,
     stage: StageParams,
     _params: ImageParams,
     source_image: Image.Image,
@@ -87,7 +92,7 @@ def upscale_resrgan(
     logger.info('upscaling image with Real ESRGAN: x%s', upscale.scale)
 
     output = np.array(source_image)
-    upsampler = load_resrgan(ctx, upscale, tile=stage.tile_size)
+    upsampler = load_resrgan(server, upscale, job.get_device(), tile=stage.tile_size)
 
     output, _ = upsampler.enhance(output, outscale=upscale.outscale)
 
diff --git a/api/onnx_web/chain/upscale_stable_diffusion.py b/api/onnx_web/chain/upscale_stable_diffusion.py
index 15ce479d..86cef5fe 100644
--- a/api/onnx_web/chain/upscale_stable_diffusion.py
+++ b/api/onnx_web/chain/upscale_stable_diffusion.py
@@ -5,10 +5,14 @@ from logging import getLogger
 from os import path
 from PIL import Image
 
+from ..device_pool import (
+    JobContext,
+)
 from ..diffusion.pipeline_onnx_stable_diffusion_upscale import (
     OnnxStableDiffusionUpscalePipeline,
 )
 from ..params import (
+    DeviceParams,
     ImageParams,
     StageParams,
     UpscaleParams,
@@ -27,7 +31,7 @@ last_pipeline_instance = None
 last_pipeline_params = (None, None)
 
 
-def load_stable_diffusion(ctx: ServerContext, upscale: UpscaleParams):
+def load_stable_diffusion(ctx: ServerContext, upscale: UpscaleParams, device: DeviceParams):
     global last_pipeline_instance
     global last_pipeline_params
 
@@ -39,11 +43,11 @@ def load_stable_diffusion(ctx: ServerContext, upscale: UpscaleParams):
         return last_pipeline_instance
 
     if upscale.format == 'onnx':
-        logger.debug('loading Stable Diffusion upscale ONNX model from %s, using provider %s', model_path, upscale.provider)
-        pipeline = OnnxStableDiffusionUpscalePipeline.from_pretrained(model_path, provider=upscale.provider)
+        logger.debug('loading Stable Diffusion upscale ONNX model from %s, using provider %s', model_path, device.provider)
+        pipeline = OnnxStableDiffusionUpscalePipeline.from_pretrained(model_path, provider=device.provider, sess_options=device.options)
     else:
-        logger.debug('loading Stable Diffusion upscale model from %s, using provider %s', model_path, upscale.provider)
-        pipeline = StableDiffusionUpscalePipeline.from_pretrained(model_path, provider=upscale.provider)
+        logger.debug('loading Stable Diffusion upscale model from %s, using provider %s', model_path, device.provider)
+        pipeline = StableDiffusionUpscalePipeline.from_pretrained(model_path, provider=device.provider, sess_options=device.options)
 
     last_pipeline_instance = pipeline
     last_pipeline_params = cache_params
@@ -53,7 +57,8 @@ def load_stable_diffusion(ctx: ServerContext, upscale: UpscaleParams):
 
 
 def upscale_stable_diffusion(
-    ctx: ServerContext,
+    job: JobContext,
+    server: ServerContext,
     _stage: StageParams,
     params: ImageParams,
     source: Image.Image,
@@ -65,7 +70,7 @@ def upscale_stable_diffusion(
     prompt = prompt or params.prompt
     logger.info('upscaling with Stable Diffusion, %s steps: %s', params.steps, prompt)
 
-    pipeline = load_stable_diffusion(ctx, upscale)
+    pipeline = load_stable_diffusion(server, upscale, job.get_device())
     generator = torch.manual_seed(params.seed)
 
     return pipeline(
diff --git a/api/onnx_web/device_pool.py b/api/onnx_web/device_pool.py
index e55665a3..7c6b051f 100644
--- a/api/onnx_web/device_pool.py
+++ b/api/onnx_web/device_pool.py
@@ -133,6 +133,9 @@ class DevicePoolExecutor:
                     return True
                 else:
                     job.set_cancel()
+                    return True
+
+        return False
 
     def done(self, key: str) -> Tuple[bool, int]:
         for job in self.jobs:
diff --git a/api/onnx_web/diffusion/load.py b/api/onnx_web/diffusion/load.py
index a070f4e3..e7661a70 100644
--- a/api/onnx_web/diffusion/load.py
+++ b/api/onnx_web/diffusion/load.py
@@ -5,6 +5,7 @@ from logging import getLogger
 from typing import Any, Optional, Tuple
 
 from ..params import (
+    DeviceParams,
     Size,
 )
 from ..utils import (
@@ -45,12 +46,12 @@ def get_tile_latents(full_latents: np.ndarray, dims: Tuple[int, int, int]) -> np
     return full_latents[:, :, y:yt, x:xt]
 
 
-def load_pipeline(pipeline: DiffusionPipeline, model: str, provider: str, scheduler: Any, device: Optional[str] = None):
+def load_pipeline(pipeline: DiffusionPipeline, model: str, scheduler: Any, device: DeviceParams):
     global last_pipeline_instance
     global last_pipeline_scheduler
     global last_pipeline_options
 
-    options = (pipeline, model, provider)
+    options = (pipeline, model, device.provider)
     if last_pipeline_instance != None and last_pipeline_options == options:
         logger.debug('reusing existing diffusion pipeline')
         pipe = last_pipeline_instance
@@ -61,11 +62,18 @@ def load_pipeline(pipeline: DiffusionPipeline, model: str, provider: str, schedu
         run_gc()
 
         logger.debug('loading new diffusion pipeline from %s', model)
+        scheduler = scheduler.from_pretrained(
+            model,
+            provider=device.provider,
+            sess_options=device.options,
+            subfolder='scheduler',
+        )
         pipe = pipeline.from_pretrained(
             model,
-            provider=provider,
+            provider=device.provider,
             safety_checker=None,
-            scheduler=scheduler.from_pretrained(model, subfolder='scheduler')
+            scheduler=scheduler,
+            sess_options=device.options,
         )
 
         if device is not None and hasattr(pipe, 'to'):
@@ -78,7 +86,11 @@ def load_pipeline(pipeline: DiffusionPipeline, model: str, provider: str, schedu
     if last_pipeline_scheduler != scheduler:
         logger.debug('loading new diffusion scheduler')
         scheduler = scheduler.from_pretrained(
-            model, subfolder='scheduler')
+            model,
+            provider=device.provider,
+            sess_options=device.options,
+            subfolder='scheduler',
+        )
 
         if device is not None and hasattr(scheduler, 'to'):
             scheduler = scheduler.to(device)
diff --git a/api/onnx_web/diffusion/run.py b/api/onnx_web/diffusion/run.py
index 1b44c700..ac7ad6fc 100644
--- a/api/onnx_web/diffusion/run.py
+++ b/api/onnx_web/diffusion/run.py
@@ -48,9 +48,8 @@ def run_txt2img_pipeline(
     output: str,
     upscale: UpscaleParams
 ) -> None:
-    device = job.get_device()
     pipe = load_pipeline(OnnxStableDiffusionPipeline,
-                         params.model, device.provider, params.scheduler, device=device.torch_device())
+                         params.model, params.scheduler, job.get_device())
 
     latents = get_latents_from_seed(params.seed, size)
     rng = np.random.RandomState(params.seed)
@@ -90,9 +89,8 @@ def run_img2img_pipeline(
     source_image: Image.Image,
     strength: float,
 ) -> None:
-    device = job.get_device()
     pipe = load_pipeline(OnnxStableDiffusionImg2ImgPipeline,
-                         params.model, device.provider, params.scheduler, device=device.torch_device())
+                         params.model, params.scheduler, job.get_device())
 
     rng = np.random.RandomState(params.seed)
 
diff --git a/api/onnx_web/onnx/onnx_net.py b/api/onnx_web/onnx/onnx_net.py
index 90c22114..9b0d14f9 100644
--- a/api/onnx_web/onnx/onnx_net.py
+++ b/api/onnx_web/onnx/onnx_net.py
@@ -1,6 +1,6 @@
 from onnxruntime import InferenceSession
 from os import path
-from typing import Any
+from typing import Any, Optional
 
 import numpy as np
 import torch
@@ -43,13 +43,19 @@ class OnnxNet():
     Provides the RRDBNet interface using an ONNX session for DirectML acceleration.
     '''
 
-    def __init__(self, ctx: ServerContext, model: str, provider='DmlExecutionProvider') -> None:
+    def __init__(
+        self,
+        server: ServerContext,
+        model: str,
+        provider: str = 'DmlExecutionProvider',
+        sess_options: Optional[dict] = None,
+    ) -> None:
         '''
         TODO: get platform provider from request params
         '''
-        model_path = path.join(ctx.model_path, model)
+        model_path = path.join(server.model_path, model)
         self.session = InferenceSession(
-            model_path, providers=[provider])
+            model_path, providers=[provider], sess_options=sess_options)
 
     def __call__(self, image: Any) -> Any:
         input_name = self.session.get_inputs()[0].name
diff --git a/api/onnx_web/params.py b/api/onnx_web/params.py
index 296c8cbc..a00f2a1f 100644
--- a/api/onnx_web/params.py
+++ b/api/onnx_web/params.py
@@ -79,7 +79,6 @@ class ImageParams:
     def __init__(
         self,
         model: str,
-        provider: str,
         scheduler: Any,
         prompt: str,
         negative_prompt: Optional[str],
@@ -88,7 +87,6 @@ class ImageParams:
         seed: int
     ) -> None:
         self.model = model
-        self.provider = provider
         self.scheduler = scheduler
         self.prompt = prompt
         self.negative_prompt = negative_prompt
@@ -96,10 +94,9 @@ class ImageParams:
         self.steps = steps
         self.seed = seed
 
-    def tojson(self) -> Dict[str, Param]:
+    def tojson(self) -> Dict[str, Optional[Param]]:
         return {
             'model': self.model,
-            'provider': self.provider,
             'scheduler': self.scheduler.__name__,
             'seed': self.seed,
             'prompt': self.prompt,
@@ -130,7 +127,6 @@ class UpscaleParams():
     def __init__(
         self,
         upscale_model: str,
-        provider: str,
         correction_model: Optional[str] = None,
         denoise: float = 0.5,
         faces=True,
@@ -143,7 +139,6 @@ class UpscaleParams():
         tile_pad: int = 10,
     ) -> None:
         self.upscale_model = upscale_model
-        self.provider = provider
         self.correction_model = correction_model
         self.denoise = denoise
         self.faces = faces
@@ -158,7 +153,6 @@ class UpscaleParams():
     def rescale(self, scale: int):
         return UpscaleParams(
             self.upscale_model,
-            self.provider,
             correction_model=self.correction_model,
             denoise=self.denoise,
             faces=self.faces,
diff --git a/api/onnx_web/serve.py b/api/onnx_web/serve.py
index 088ed816..779c7741 100644
--- a/api/onnx_web/serve.py
+++ b/api/onnx_web/serve.py
@@ -226,7 +226,7 @@ def pipeline_from_request() -> Tuple[DeviceParams, ImageParams, Size]:
     logger.info("request from %s: %s rounds of %s using %s on %s, %sx%s, %s, %s - %s",
                 user, steps, scheduler.__name__, model_path, device.provider, width, height, cfg, seed, prompt)
 
-    params = ImageParams(model_path, device.provider, scheduler, prompt,
+    params = ImageParams(model_path, scheduler, prompt,
                          negative_prompt, cfg, steps, seed)
     size = Size(width, height)
     return (device, params, size)
@@ -245,7 +245,7 @@ def border_from_request() -> Border:
     return Border(left, right, top, bottom)
 
 
-def upscale_from_request(provider: str) -> UpscaleParams:
+def upscale_from_request() -> UpscaleParams:
     denoise = get_and_clamp_float(request.args, 'denoise', 0.5, 1.0, 0.0)
     scale = get_and_clamp_int(request.args, 'scale', 1, 4, 1)
     outscale = get_and_clamp_int(request.args, 'outscale', 1, 4, 1)
@@ -257,7 +257,6 @@ def upscale_from_request(provider: str) -> UpscaleParams:
 
     return UpscaleParams(
         upscaling,
-        provider,
         correction_model=correction,
         denoise=denoise,
         faces=faces,
@@ -327,7 +326,7 @@ def load_platforms():
         if platform_providers[potential] in providers and potential not in context.block_platforms:
             if potential == 'cuda':
                 for i in range(torch.cuda.device_count()):
-                    available_platforms.append(DeviceParams('%s:%s' % (potential, i), platform_providers[potential], {
+                    available_platforms.append(DeviceParams(potential, platform_providers[potential], {
                         'device_id': i,
                     }))
             else:
@@ -344,7 +343,6 @@ def load_platforms():
 
         return -1
 
-
     available_platforms = sorted(available_platforms, key=cmp_to_key(cpu_last))
 
     logger.info('available acceleration platforms: %s',
@@ -456,7 +454,7 @@ def img2img():
     source_image = Image.open(BytesIO(source_file.read())).convert('RGB')
 
     device, params, size = pipeline_from_request()
-    upscale = upscale_from_request(params.provider)
+    upscale = upscale_from_request()
 
     strength = get_and_clamp_float(
         request.args,
diff --git a/onnx-web.code-workspace b/onnx-web.code-workspace
index 6447e815..42dd5d87 100644
--- a/onnx-web.code-workspace
+++ b/onnx-web.code-workspace
@@ -54,6 +54,7 @@
 			"scandir",
 			"scipy",
 			"scrollback",
+			"sess",
 			"Singlestep",
 			"spacy",
 			"spinalcase",