diff --git a/PyTeX/format/formatting_config.py b/PyTeX/format/formatting_config.py
index 8388e09..e98134b 100644
--- a/PyTeX/format/formatting_config.py
+++ b/PyTeX/format/formatting_config.py
@@ -30,6 +30,18 @@ class VersionInfo:
             return self._repo_version
 
 
+def clean_dict(dictionary: Dict) -> Optional[Dict]:
+    aux = {
+        k: clean_dict(v) for k, v in dictionary.items() if type(v) == dict
+    } | {
+        k: v for k, v in dictionary.items() if type(v) != dict
+    }
+    aux2 = {
+        k: v for k, v in aux.items() if v is not None
+    }
+    return aux2 if aux2 != {} else None
+
+
 class FormattingConfig(Config):
     def __init__(self):
         self._naming_scheme: Optional[Union[NamingScheme, str]] = None
@@ -80,7 +92,11 @@ class FormattingConfig(Config):
 
     def dump_as_yaml(self, filename: Path):
         with filename.open('w') as file:
-            yaml.dump(self.to_json(), file)
+            simple_dict = clean_dict(self.to_json())
+            if simple_dict is not None:
+                yaml.dump(simple_dict, file)
+            else:
+                pass  # TODO
 
     def to_json(self) -> Dict:
         return {
diff --git a/main.py b/main.py
index 9bc5d86..acc9843 100644
--- a/main.py
+++ b/main.py
@@ -53,8 +53,9 @@ config: FormattingConfig = FormattingConfig()
 
 dump = config.to_json()
 
+config.naming_scheme = 'prepend-author'
+
 config.dump_as_yaml(Path('test.yaml'))
 
 
-config.naming_scheme = 'prepend-author'