diff --git a/lib/src/models/documents/attribute.dart b/lib/src/models/documents/attribute.dart
index db667ce1..ecf05e26 100644
--- a/lib/src/models/documents/attribute.dart
+++ b/lib/src/models/documents/attribute.dart
@@ -39,6 +39,7 @@ class Attribute<T> {
     Attribute.height.key: Attribute.height,
     Attribute.style.key: Attribute.style,
     Attribute.token.key: Attribute.token,
+    Attribute.script.key: Attribute.script,
   });
 
   static final BoldAttribute bold = BoldAttribute();
@@ -85,6 +86,8 @@ class Attribute<T> {
 
   static final TokenAttribute token = TokenAttribute('');
 
+  static final ScriptAttribute script = ScriptAttribute('');
+
   static final Set<String> inlineKeys = {
     Attribute.bold.key,
     Attribute.italic.key,
@@ -312,3 +315,8 @@ class StyleAttribute extends Attribute<String?> {
 class TokenAttribute extends Attribute<String> {
   TokenAttribute(String val) : super('token', AttributeScope.IGNORE, val);
 }
+
+// `script` is supposed to be inline attribute but it is not supported yet
+class ScriptAttribute extends Attribute<String> {
+  ScriptAttribute(String val) : super('script', AttributeScope.IGNORE, val);
+}