diff --git a/vscode.proposed.d.ts b/vscode.proposed.d.ts
index acd43403b2..4ecfc0b0b6 100644
--- a/vscode.proposed.d.ts
+++ b/vscode.proposed.d.ts
@@ -562,6 +562,10 @@ declare module 'vscode' {
 	}
 
 	export interface NotebookContentProvider {
+		readonly options?: NotebookDocumentContentOptions;
+		readonly onDidChangeNotebookContentOptions?: Event<NotebookDocumentContentOptions>;
+		readonly onDidChangeNotebook: Event<NotebookDocumentContentChangeEvent | NotebookDocumentEditEvent>;
+
 		/**
 		 * Content providers should always use [file system providers](#FileSystemProvider) to
 		 * resolve the raw content for `uri` as the resouce is not necessarily a file on disk.
@@ -570,7 +574,6 @@ declare module 'vscode' {
 		resolveNotebook(document: NotebookDocument, webview: NotebookCommunication): Promise<void>;
 		saveNotebook(document: NotebookDocument, cancellation: CancellationToken): Promise<void>;
 		saveNotebookAs(targetResource: Uri, document: NotebookDocument, cancellation: CancellationToken): Promise<void>;
-		readonly onDidChangeNotebook: Event<NotebookDocumentContentChangeEvent | NotebookDocumentEditEvent>;
 		backupNotebook(document: NotebookDocument, context: NotebookDocumentBackupContext, cancellation: CancellationToken): Promise<NotebookDocumentBackup>;
 	}