diff --git a/extensions/markdown-language-features/src/client/client.ts b/extensions/markdown-language-features/src/client/client.ts
index 55b0948ddd4f9..0939d78f62a6c 100644
--- a/extensions/markdown-language-features/src/client/client.ts
+++ b/extensions/markdown-language-features/src/client/client.ts
@@ -60,7 +60,7 @@ export class MdLanguageClient implements IDisposable {
 		return this.#client.sendRequest(proto.getUpdatePastedLinksEdit, {
 			metadata,
 			pasteIntoDoc: pastingIntoDoc.toString(),
-			edits: edits.map(edit => lsp.TextEdit.replace(toLspRange(edit.range), edit.newText)),
+			edits: edits.map(proto.serializeTextEdit),
 		}, token);
 	}
 }
diff --git a/extensions/markdown-language-features/src/client/protocol.ts b/extensions/markdown-language-features/src/client/protocol.ts
index a822327f9ffb4..db004edc8ecff 100644
--- a/extensions/markdown-language-features/src/client/protocol.ts
+++ b/extensions/markdown-language-features/src/client/protocol.ts
@@ -32,7 +32,23 @@ export const getReferencesToFileInWorkspace = new RequestType<{ uri: string }, l
 export const getEditForFileRenames = new RequestType<Array<FileRename>, { participatingRenames: readonly FileRename[]; edit: lsp.WorkspaceEdit }, any>('markdown/getEditForFileRenames');
 
 export const prepareUpdatePastedLinks = new RequestType<{ uri: string; ranges: lsp.Range[] }, string, any>('markdown/prepareUpdatePastedLinks');
-export const getUpdatePastedLinksEdit = new RequestType<{ pasteIntoDoc: string; metadata: string; edits: lsp.TextEdit[] }, lsp.TextEdit[] | undefined, any>('markdown/getUpdatePastedLinksEdit');
+/** Text edit wire format expected by vscode-markdown-languageserver. */
+export type SerializedTextEdit = {
+	readonly range: readonly [lsp.Position, lsp.Position];
+	readonly newText: string;
+};
+
+export function serializeTextEdit(edit: vscode.TextEdit): SerializedTextEdit {
+	return {
+		range: [
+			{ line: edit.range.start.line, character: edit.range.start.character },
+			{ line: edit.range.end.line, character: edit.range.end.character },
+		],
+		newText: edit.newText,
+	};
+}
+
+export const getUpdatePastedLinksEdit = new RequestType<{ pasteIntoDoc: string; metadata: string; edits: SerializedTextEdit[] }, lsp.TextEdit[] | undefined, any>('markdown/getUpdatePastedLinksEdit');
 
 export const fs_watcher_onChange = new RequestType<{ id: number; uri: string; kind: 'create' | 'change' | 'delete' }, void, any>('markdown/fs/watcher/onChange');
 
diff --git a/extensions/markdown-language-features/src/test/protocol.test.ts b/extensions/markdown-language-features/src/test/protocol.test.ts
new file mode 100644
index 0000000000000..1d7930c8ebdfc
--- /dev/null
+++ b/extensions/markdown-language-features/src/test/protocol.test.ts
@@ -0,0 +1,23 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import * as assert from 'assert';
+import 'mocha';
+import * as vscode from 'vscode';
+import { serializeTextEdit } from '../client/protocol';
+
+suite('Markdown protocol', () => {
+	test('serializes text edits using the server range format', () => {
+		const edit = new vscode.TextEdit(new vscode.Range(1, 2, 3, 4), 'new text');
+
+		assert.deepStrictEqual(serializeTextEdit(edit), {
+			range: [
+				{ line: 1, character: 2 },
+				{ line: 3, character: 4 },
+			],
+			newText: 'new text',
+		});
+	});
+});