diff --git a/src/anemoi/inference/checkpoint.py b/src/anemoi/inference/checkpoint.py
index cdf34bf..5a1754d 100644
--- a/src/anemoi/inference/checkpoint.py
+++ b/src/anemoi/inference/checkpoint.py
@@ -11,8 +11,8 @@
 import datetime
 import logging
 from collections import defaultdict
-from pathlib import Path
 from functools import cached_property
+from pathlib import Path
 
 from anemoi.utils.checkpoints import load_metadata
 from earthkit.data.utils.dates import to_datetime
@@ -25,19 +25,22 @@
 def _download_huggingfacehub(huggingface_config):
     """Download model from huggingface"""
     try:
-        from huggingface_hub import hf_hub_download, snapshot_download
+        from huggingface_hub import hf_hub_download
+        from huggingface_hub import snapshot_download
     except ImportError as e:
         raise ImportError("Could not import `huggingface_hub`, please run `pip install huggingface_hub`.") from e
 
-    if 'filename' in huggingface_config:
+    if "filename" in huggingface_config:
         config_path = hf_hub_download(**huggingface_config)
     else:
         repo_path = Path(snapshot_download(**huggingface_config))
-        ckpt_files = list(repo_path.glob('*.ckpt'))
+        ckpt_files = list(repo_path.glob("*.ckpt"))
         if len(ckpt_files) == 1:
             return str(ckpt_files[0])
         else:
-            ValueError(f"Multiple ckpt files found in repo, {ckpt_files}.\nCannot pick one to load, please specify `filename`.")
+            ValueError(
+                f"Multiple ckpt files found in repo, {ckpt_files}.\nCannot pick one to load, please specify `filename`."
+            )
     return config_path