diff --git a/front/src/Api/Events/IframeEvent.ts b/front/src/Api/Events/IframeEvent.ts
index 0657b15a..1ed853c9 100644
--- a/front/src/Api/Events/IframeEvent.ts
+++ b/front/src/Api/Events/IframeEvent.ts
@@ -11,6 +11,10 @@ import { OpenTabEvent } from './OpenTabEvent';
 import { UserInputChatEvent } from './UserInputChatEvent';
 
 
+export interface TypedMessageEvent<T> extends MessageEvent {
+    data: T
+}
+
 export type IframeEventMap = {
     //getState: GameStateEvent,
     // updateTile: UpdateTileEvent
diff --git a/front/src/Api/IframeListener.ts b/front/src/Api/IframeListener.ts
index 03f81210..d3b8ce4f 100644
--- a/front/src/Api/IframeListener.ts
+++ b/front/src/Api/IframeListener.ts
@@ -10,7 +10,7 @@ import { ClosePopupEvent, isClosePopupEvent } from "./Events/ClosePopupEvent";
 import { scriptUtils } from "./ScriptUtils";
 import { GoToPageEvent, isGoToPageEvent } from "./Events/GoToPageEvent";
 import { isOpenCoWebsite, OpenCoWebSiteEvent } from "./Events/OpenCoWebSiteEvent";
-import { IframeEventMap, IframeEvent, IframeResponseEvent, IframeResponseEventMap, isIframeEventWrapper } from "./Events/IframeEvent";
+import { IframeEventMap, IframeEvent, IframeResponseEvent, IframeResponseEventMap, isIframeEventWrapper, TypedMessageEvent } from "./Events/IframeEvent";
 import { UserInputChatEvent } from "./Events/UserInputChatEvent";
 
 
@@ -56,7 +56,7 @@ class IframeListener {
     private readonly scripts = new Map<string, HTMLIFrameElement>();
 
     init() {
-        window.addEventListener("message", (message: MessageEvent<IframeEvent<keyof IframeEventMap>>) => {
+        window.addEventListener("message", (message: TypedMessageEvent<IframeEvent<keyof IframeEventMap>>) => {
             // Do we trust the sender of this message?
             // Let's only accept messages from the iframe that are allowed.
             // Note: maybe we could restrict on the domain too for additional security (in case the iframe goes to another domain).