diff --git a/networks/lora.py b/networks/lora.py
index 77fe26a7..de87d064 100644
--- a/networks/lora.py
+++ b/networks/lora.py
@@ -58,7 +58,7 @@ class LoRANetwork(torch.nn.Module):
   TEXT_ENCODER_TARGET_REPLACE_MODULE = ["CLIPAttention", "CLIPMLP"]
   LORA_PREFIX_UNET = 'lora_unet'
   LORA_PREFIX_TEXT_ENCODER = 'lora_te'
-  METADATA_FILENAME = "sd_scripts_metadata.json"
+  METADATA_KEY_NAME = "sd_scripts_metadata"
 
   def __init__(self, text_encoder, unet, multiplier=1.0, lora_dim=4) -> None:
     super().__init__()
@@ -178,7 +178,7 @@ class LoRANetwork(torch.nn.Module):
     return self.parameters()
 
   def save_weights(self, file, dtype, metadata):
-    if len(metadata) == 0:
+    if metadata is not None and len(metadata) == 0:
       metadata = None
 
     state_dict = self.state_dict()
@@ -193,7 +193,6 @@ class LoRANetwork(torch.nn.Module):
       from safetensors.torch import save_file
       save_file(state_dict, file, metadata)
     else:
-      torch.save(state_dict, file)
       if metadata is not None:
-        with zipfile.ZipFile(file, "w") as zipf:
-          zipf.writestr(LoRANetwork.METADATA_FILENAME, json.dumps(metadata))
+        state_dict[LoRANetwork.METADATA_KEY_NAME] = metadata
+      torch.save(state_dict, file)