diff --git a/src/vs/workbench/api/common/extHost.api.impl.ts b/src/vs/workbench/api/common/extHost.api.impl.ts
index 968fb7f776d..e801af2c03c 100644
--- a/src/vs/workbench/api/common/extHost.api.impl.ts
+++ b/src/vs/workbench/api/common/extHost.api.impl.ts
@@ -223,6 +223,9 @@ export function createApiFactoryAndRegisterActors(accessor: ServicesAccessor): I
 					if (typeof filter.exclusive === 'boolean') {
 						checkProposedApiEnabled(extension, 'documentFiltersExclusive');
 					}
+					if (typeof filter.notebookType === 'string') {
+						checkProposedApiEnabled(extension, 'notebookDocumentSelector');
+					}
 				}
 				return selector;
 			};
diff --git a/src/vs/workbench/api/common/extHost.protocol.ts b/src/vs/workbench/api/common/extHost.protocol.ts
index 352e2b8c95a..13f03c1ecb2 100644
--- a/src/vs/workbench/api/common/extHost.protocol.ts
+++ b/src/vs/workbench/api/common/extHost.protocol.ts
@@ -336,6 +336,7 @@ export interface IDocumentFilterDto {
 	scheme?: string;
 	pattern?: string | IRelativePattern;
 	exclusive?: boolean;
+	notebookType?: string;
 }
 
 export interface ISignatureHelpProviderMetadataDto {
diff --git a/src/vs/workbench/api/common/extHostTypeConverters.ts b/src/vs/workbench/api/common/extHostTypeConverters.ts
index f7f40cc4356..9c2420847da 100644
--- a/src/vs/workbench/api/common/extHostTypeConverters.ts
+++ b/src/vs/workbench/api/common/extHostTypeConverters.ts
@@ -148,7 +148,8 @@ export namespace DocumentSelector {
 				language: selector.language,
 				scheme: _transformScheme(selector.scheme, uriTransformer),
 				pattern: GlobPattern.from(selector.pattern) ?? undefined,
-				exclusive: selector.exclusive
+				exclusive: selector.exclusive,
+				notebookType: selector.notebookType
 			};
 		}
 
diff --git a/src/vs/workbench/services/extensions/common/extensionsApiProposals.ts b/src/vs/workbench/services/extensions/common/extensionsApiProposals.ts
index f0abd29f5bc..7c02533c953 100644
--- a/src/vs/workbench/services/extensions/common/extensionsApiProposals.ts
+++ b/src/vs/workbench/services/extensions/common/extensionsApiProposals.ts
@@ -34,6 +34,7 @@ export const allApiProposals = Object.freeze({
 	notebookControllerKind: 'https://raw.githubusercontent.com/microsoft/vscode/main/src/vscode-dts/vscode.proposed.notebookControllerKind.d.ts',
 	notebookDebugOptions: 'https://raw.githubusercontent.com/microsoft/vscode/main/src/vscode-dts/vscode.proposed.notebookDebugOptions.d.ts',
 	notebookDeprecated: 'https://raw.githubusercontent.com/microsoft/vscode/main/src/vscode-dts/vscode.proposed.notebookDeprecated.d.ts',
+	notebookDocumentSelector: 'https://raw.githubusercontent.com/microsoft/vscode/main/src/vscode-dts/vscode.proposed.notebookDocumentSelector.d.ts',
 	notebookEditor: 'https://raw.githubusercontent.com/microsoft/vscode/main/src/vscode-dts/vscode.proposed.notebookEditor.d.ts',
 	notebookEditorDecorationType: 'https://raw.githubusercontent.com/microsoft/vscode/main/src/vscode-dts/vscode.proposed.notebookEditorDecorationType.d.ts',
 	notebookEditorEdit: 'https://raw.githubusercontent.com/microsoft/vscode/main/src/vscode-dts/vscode.proposed.notebookEditorEdit.d.ts',
diff --git a/src/vscode-dts/vscode.proposed.notebookDocumentSelector.d.ts b/src/vscode-dts/vscode.proposed.notebookDocumentSelector.d.ts
new file mode 100644
index 00000000000..13f9c7919e6
--- /dev/null
+++ b/src/vscode-dts/vscode.proposed.notebookDocumentSelector.d.ts
@@ -0,0 +1,17 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+declare module 'vscode' {
+
+	// https://github.com/microsoft/vscode/issues/141143
+
+	export interface DocumentFilter {
+
+		/**
+		 * The {@link NotebookDocument.notebookType type} of a notebook, like `jupyter`
+		 */
+		readonly notebookType?: string;
+	}
+}