diff --git a/blueprintcompiler/language/gobject_property.py b/blueprintcompiler/language/gobject_property.py
index b267083..d896514 100644
--- a/blueprintcompiler/language/gobject_property.py
+++ b/blueprintcompiler/language/gobject_property.py
@@ -27,7 +27,9 @@ from .values import ArrayValue, ObjectValue, Value, VariantValue
 
 class Property(AstNode):
     grammar = Statement(
-        UseIdent("name"), ":", AnyOf(Binding, VariantValue, ObjectValue, Value, ArrayValue)
+        UseIdent("name"),
+        ":",
+        AnyOf(Binding, VariantValue, ObjectValue, Value, ArrayValue),
     )
 
     @property
diff --git a/blueprintcompiler/language/values.py b/blueprintcompiler/language/values.py
index 41a4c5e..975dd95 100644
--- a/blueprintcompiler/language/values.py
+++ b/blueprintcompiler/language/values.py
@@ -371,16 +371,9 @@ class IdentLiteral(AstNode):
         else:
             return None
 
+
 class VariantValue(AstNode):
-    grammar = [
-        "variant",
-        "<",
-        UseQuoted("type"),
-        ">",
-        "(",
-        UseQuoted("value"),
-        ")"
-    ]
+    grammar = ["variant", "<", UseQuoted("type"), ">", "(", UseQuoted("value"), ")"]
 
     @property
     def var_type(self) -> str:
@@ -404,12 +397,16 @@ class VariantValue(AstNode):
             raise CompileError(f"Cannot convert variant to number")
         elif isinstance(expected_type, gir.StringType):
             raise CompileError("Cannot convert variant to string")
-        elif isinstance(expected_type, gir.Boxed) and expected_type.full_name == "GLib.Variant":
+        elif (
+            isinstance(expected_type, gir.Boxed)
+            and expected_type.full_name == "GLib.Variant"
+        ):
             pass
         else:
             raise CompileError(f"Cannot convert variant into {expected_type.full_name}")
         pass
 
+
 class Literal(AstNode):
     grammar = AnyOf(
         TypeLiteral,