diff --git a/packages/libro-core/src/cell/libro-cell-view.tsx b/packages/libro-core/src/cell/libro-cell-view.tsx
index 08b85c65..e6c6bc27 100644
--- a/packages/libro-core/src/cell/libro-cell-view.tsx
+++ b/packages/libro-core/src/cell/libro-cell-view.tsx
@@ -137,7 +137,7 @@ export class LibroCellView extends BaseView implements CellView {
     super.dispose();
   }
   toJSON(): LibroCell {
-    const meta = { ...(this.model.toJSON() as LibroCell), outputs: [] };
+    const meta = { ...(this.model.toJSON() as LibroCell) };
     const modelContribution = this.cellService.findModelProvider(this.model.options);
     if (modelContribution?.cellMeta.nbformatType) {
       meta.metadata.libroCellType = modelContribution?.cellMeta.type;
diff --git a/packages/libro-core/src/cell/libro-executable-cell-view.ts b/packages/libro-core/src/cell/libro-executable-cell-view.ts
index 59cd6511..892e7b51 100644
--- a/packages/libro-core/src/cell/libro-executable-cell-view.ts
+++ b/packages/libro-core/src/cell/libro-executable-cell-view.ts
@@ -1,3 +1,4 @@
+import type { ICodeCell } from '@difizen/libro-common';
 import { watch } from '@difizen/mana-app';
 import { ViewOption } from '@difizen/mana-app';
 import { inject } from '@difizen/mana-app';
@@ -6,6 +7,7 @@ import type { CellModel } from '../libro-protocol.js';
 import type { CellViewOptions } from '../libro-protocol.js';
 import type { BaseOutputArea } from '../output/index.js';
 
+import type { LibroCell } from './libro-cell-protocol.js';
 import { CellService } from './libro-cell-protocol.js';
 import { EditorCellView, LibroEditorCellView } from './libro-edit-cell-view.js';
 import { ExecutableCellModel } from './libro-executable-cell-model.js';
@@ -78,6 +80,15 @@ export abstract class LibroEditableExecutableCellView
       }),
     );
   }
+
+  override toJSON(): LibroCell {
+    const meta = super.toJSON();
+    return {
+      ...meta,
+      source: meta.source ?? this.options.cell.source,
+      outputs: this.outputArea?.toJSON() ?? [],
+    } as ICodeCell;
+  }
 }
 
 /**