diff --git a/library/config_util.py b/library/config_util.py
index afc9be75..e62bfb89 100644
--- a/library/config_util.py
+++ b/library/config_util.py
@@ -167,7 +167,7 @@ class ConfigSanitizer:
     "enable_bucket": bool,
     "max_bucket_reso": int,
     "min_bucket_reso": int,
-    "resolution": functools.partial(__validate_and_convert_scalar_or_twodim, int),
+    "resolution": functools.partial(__validate_and_convert_scalar_or_twodim.__func__, int),
   }
 
   # options handled by argparse but not handled by user config
@@ -283,7 +283,9 @@ class ConfigSanitizer:
   def __merge_dict(*dict_list: dict) -> dict:
     merged = {}
     for schema in dict_list:
-      merged |= schema
+      # merged |= schema
+      for k, v in schema.items():
+        merged[k] = v
     return merged
 
 
diff --git a/train_network.py b/train_network.py
index ba2f4464..ef5a0831 100644
--- a/train_network.py
+++ b/train_network.py
@@ -408,7 +408,7 @@ def train(args):
             "img_count": subset.img_count
         }
 
-    metadata |= {
+    metadata.update({
         "ss_batch_size_per_device": args.train_batch_size,
         "ss_total_batch_size": total_batch_size,
         "ss_resolution": args.resolution,
@@ -425,7 +425,7 @@ def train(args):
         "ss_reg_dataset_dirs": json.dumps(reg_dataset_dirs_info),
         "ss_tag_frequency": json.dumps(dataset.tag_frequency),
         "ss_bucket_info": json.dumps(dataset.bucket_info),
-    }
+    })
 
   if args.network_args:
     for key, value in net_kwargs.items():