diff --git a/dist/other/jupyterlite/MessageHandler.d.ts b/dist/other/jupyterlite/MessageHandler.d.ts
index 4b29bc5..fdffbf9 100644
--- a/dist/other/jupyterlite/MessageHandler.d.ts
+++ b/dist/other/jupyterlite/MessageHandler.d.ts
@@ -9,6 +9,6 @@ declare class MessageHandler {
     destroy(): void;
     addHandlers(action: IframeMessageSchema["action"], handlers: HandlerFunction[]): void;
     private receiveMessage;
-    sendData(data: JSON): void;
+    sendData(data: object): void;
 }
 export default MessageHandler;
diff --git a/src/other/jupyterlite/MessageHandler.ts b/src/other/jupyterlite/MessageHandler.ts
index d80862c..92b2d53 100644
--- a/src/other/jupyterlite/MessageHandler.ts
+++ b/src/other/jupyterlite/MessageHandler.ts
@@ -58,7 +58,7 @@ class MessageHandler {
         }
     };
 
-    public sendData(data: JSON): void {
+    public sendData(data: object): void {
         const message = {
             type: "from-host-to-iframe",
             action: "set-data",