diff --git a/src/widget/chat-floating-button.tsx b/src/widget/chat-floating-button.tsx
index 688b667..e9ed3be 100644
--- a/src/widget/chat-floating-button.tsx
+++ b/src/widget/chat-floating-button.tsx
@@ -27,6 +27,7 @@ export default class ChatFloatingButton extends Component<IChatFloatingButtonPro
                             <img
                                 src={conf.bubbleAvatarUrl}
                                 style={{...closedChatAvatarImageStyle}}
+                                alt="chat-bubble-avatar"
                             />: <div style={{ display: 'flex', alignItems: 'center' }}><br/>{conf.bubbleAvatarUrl}</div>)
                     }
                 </div>
@@ -38,4 +39,4 @@ export default class ChatFloatingButton extends Component<IChatFloatingButtonPro
 interface IChatFloatingButtonProps {
     onClick: any,
     conf: IConfiguration
-}
\ No newline at end of file
+}