diff --git a/src/components/chat.tsx b/src/components/chat.tsx
index e1965e46..5df2a2ca 100644
--- a/src/components/chat.tsx
+++ b/src/components/chat.tsx
@@ -52,6 +52,8 @@ export default function Chat({ className }: ChatProps) {
     setExpand(true)
   }
 
+  const lastMessage = messages[messages.length - 1]
+
   return (
     <div className={cn(bingStyle.toLowerCase(), { 'side-panel-expanded': expand })}>
       <PromptsManage insertPrompt={setInput} />
@@ -68,8 +70,8 @@ export default function Chat({ className }: ChatProps) {
               <>
                 <ChatList messages={messages} />
                 <ChatScrollAnchor trackVisibility={generating} />
-                <ChatNotification message={messages.at(-1)} bot={bot} />
-                {messages.at(-1)?.suggestedResponses && <ChatSuggestions setInput={setInput} suggestions={messages.at(-1)?.suggestedResponses} />}
+                <ChatNotification message={lastMessage} bot={bot} />
+                {lastMessage?.suggestedResponses && <ChatSuggestions setInput={setInput} suggestions={lastMessage?.suggestedResponses} />}
 
                 {generating ? (
                   <div className="flex h-10 items-center justify-center my-4">
diff --git a/src/lib/bots/bing/index.ts b/src/lib/bots/bing/index.ts
index cb58176d..33a84870 100644
--- a/src/lib/bots/bing/index.ts
+++ b/src/lib/bots/bing/index.ts
@@ -473,7 +473,7 @@ export class BingWebBot {
           return
         }
 
-        const lastMessage = event.item.messages.at(-1) as ChatResponseMessage
+        const lastMessage = event.item.messages[event.item.messages.length - 1] as ChatResponseMessage
         const specialMessage = event.item.messages.find(message => message.author === 'bot' && message.contentType === 'IMAGE')
         if (specialMessage) {
           this.generateContent(specialMessage)
diff --git a/tsconfig.json b/tsconfig.json
index 614d77cf..7a95f103 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,6 +1,6 @@
 {
   "compilerOptions": {
-    "target": "ES2020",
+    "target": "ES2019",
     "lib": ["dom", "dom.iterable", "esnext"],
     "allowJs": true,
     "skipLibCheck": true,