diff --git a/dicfg/config.py b/dicfg/config.py
index 052293c..d3c7ba9 100644
--- a/dicfg/config.py
+++ b/dicfg/config.py
@@ -102,7 +102,7 @@ def _update(a: ConfigValue, b: ConfigValue):
                 a[k].merge(v)
         else:
             if prev_key is None:
-                a.data = {**{k: v}, **a.data}
+                a.data = {**a.data, **{k: v}}
             else:
                 a.data = _insert(a, prev_key, k, v)
         prev_key = k
diff --git a/dicfg/reader.py b/dicfg/reader.py
index 4c764f6..4496d50 100644
--- a/dicfg/reader.py
+++ b/dicfg/reader.py
@@ -107,7 +107,7 @@ def read(
                 user_presets = read_user_config.pop("presets", ())
                 user_configs.append(read_user_config)
                 user_presets_configs.extend(self._read_presets(user_presets))
-
+                
         configs = (
             self_config,
             *tuple(user_presets_configs),