diff --git a/lib/models/documents/attribute.dart b/lib/models/documents/attribute.dart
index 1e2cb97b..cd152e53 100644
--- a/lib/models/documents/attribute.dart
+++ b/lib/models/documents/attribute.dart
@@ -202,8 +202,8 @@ class StrikeThroughAttribute extends Attribute<bool> {
   StrikeThroughAttribute() : super('strike', AttributeScope.INLINE, true);
 }
 
-class FontAttribute extends Attribute<double> {
-  FontAttribute(double val) : super('font', AttributeScope.INLINE, val);
+class FontAttribute extends Attribute<String> {
+  FontAttribute(String val) : super('font', AttributeScope.INLINE, val);
 }
 
 class SizeAttribute extends Attribute<String> {