diff --git a/src/LanguageServerProtocol.fs b/src/LanguageServerProtocol.fs
index 35706d2..d7cae61 100644
--- a/src/LanguageServerProtocol.fs
+++ b/src/LanguageServerProtocol.fs
@@ -1655,6 +1655,14 @@ module Types =
         Diagnostics: Diagnostic[]
     }
 
+    type CodeActionDisabled = {
+        /// Human readable description of why the code action is currently
+        /// disabled.
+        ///
+        /// This is displayed in the code actions UI.
+        Reason: string
+    }
+
     /// A code action represents a change that can be performed in code, e.g. to fix a problem or
     /// to refactor code.
     ///
@@ -1671,6 +1679,35 @@ module Types =
         /// The diagnostics that this code action resolves.
         Diagnostics: Diagnostic[] option
 
+        /// Marks this as a preferred action. Preferred actions are used by the
+        /// `auto fix` command and can be targeted by keybindings.
+        ///
+        /// * A quick fix should be marked preferred if it properly addresses the
+        /// underlying error. A refactoring should be marked preferred if it is the
+        /// most reasonable choice of actions to take.
+        ///
+        /// * @since 3.15.0
+        IsPreferred: bool option
+
+        /// Marks that the code action cannot currently be applied.
+        ///
+        /// Clients should follow the following guidelines regarding disabled code
+        /// actions:
+        ///
+        /// - Disabled code actions are not shown in automatic lightbulbs code
+        /// action menus.
+        ///
+        /// - Disabled actions are shown as faded out in the code action menu when
+        /// the user request a more specific type of code action, such as
+        /// refactorings.
+        ///
+        /// - If the user has a keybinding that auto applies a code action and only
+        /// a disabled code actions are returned, the client should show the user
+        /// an error message with `reason` in the editor.
+        ///
+        /// @since 3.16.0
+        Disabled: CodeActionDisabled option
+
         /// The workspace edit this code action performs.
         Edit: WorkspaceEdit option