diff --git a/frontend_nuxt/pages/message-box/[id].vue b/frontend_nuxt/pages/message-box/[id].vue
index 58e43962e..c6259d2f0 100644
--- a/frontend_nuxt/pages/message-box/[id].vue
+++ b/frontend_nuxt/pages/message-box/[id].vue
@@ -480,6 +480,7 @@ function goBack() {
 }
 
 .chat-container.float {
+  height: 100vh;
 }
 
 .chat-header {