diff --git a/sources/app/api.ts b/sources/app/api.ts
index 0bb1f04..7f9fed3 100644
--- a/sources/app/api.ts
+++ b/sources/app/api.ts
@@ -435,8 +435,13 @@ export async function startApi() {
                 const updContent: PrismaJson.UpdateBody = {
                     t: 'new-message',
                     sid: sid,
-                    mid: msg.id,
-                    c: msgContent
+                    message: {
+                        id: msg.id,
+                        seq: msg.seq,
+                        content: msgContent,
+                        createdAt: msg.createdAt.getTime(),
+                        updatedAt: msg.updatedAt.getTime()
+                    }
                 };
 
                 const update = await tx.update.create({
diff --git a/sources/storage/types.ts b/sources/storage/types.ts
index d948d3c..eb59f74 100644
--- a/sources/storage/types.ts
+++ b/sources/storage/types.ts
@@ -10,8 +10,13 @@ declare global {
         type UpdateBody = {
             t: 'new-message';
             sid: string;
-            mid: string;
-            c: SessionMessageContent;
+            message: {
+                id: string;
+                seq: number;
+                content: SessionMessageContent;
+                createdAt: number;
+                updatedAt: number;
+            }
         } | {
             t: 'new-session';
             id: string;