diff --git a/pvnet/models/base_model.py b/pvnet/models/base_model.py
index e6e0e907..37210e66 100644
--- a/pvnet/models/base_model.py
+++ b/pvnet/models/base_model.py
@@ -94,7 +94,7 @@ def minimize_data_config(input_path, output_path, model):
         if not model.include_nwp:
             del config["input_data"]["nwp"]
         else:
-            for nwp_source in config["input_data"]["nwp"].keys():
+            for nwp_source in list(config["input_data"]["nwp"].keys()):
                 nwp_config = config["input_data"]["nwp"][nwp_source]
 
                 if nwp_source not in model.nwp_encoders_dict:
diff --git a/scripts/checkpoint_to_huggingface.py b/scripts/checkpoint_to_huggingface.py
index 0005b396..56fd8d97 100644
--- a/scripts/checkpoint_to_huggingface.py
+++ b/scripts/checkpoint_to_huggingface.py
@@ -2,8 +2,8 @@
 
 use:
 python checkpoint_to_huggingface.py "path/to/model/checkpoints" \
-    --huggingface_repo="openclimatefix/pvnet_uk_region" \
-    --wandb_repo="openclimatefix/pvnet2.1"" \
+    --huggingface-repo="openclimatefix/pvnet_uk_region" \
+    --wandb-repo="openclimatefix/pvnet2.1" \
     --local-path="~/tmp/this_model" \
     --no-push-to-hub
 """
@@ -19,10 +19,10 @@
 def push_to_huggingface(
     checkpoint_dir_paths: list[str],
     huggingface_repo: str = "openclimatefix/pvnet_uk_region",  # e.g. openclimatefix/windnet_india
-    wandb_repo: str | None = "openclimatefix/pvnet2.1",
+    wandb_repo: str = "openclimatefix/pvnet2.1",
     val_best: bool = True,
-    wandb_ids: list[str] | None = [],
-    local_path: str | None = None,
+    wandb_ids: list[str] = [],
+    local_path: str = None,
     push_to_hub: bool = True,
 ):
     """Push a local model to a huggingface model repo