diff --git a/plugins/chat/assets/stylesheets/common/chat-transcript.scss b/plugins/chat/assets/stylesheets/common/chat-transcript.scss
index a8c8ab3b72e..1a70987b426 100644
--- a/plugins/chat/assets/stylesheets/common/chat-transcript.scss
+++ b/plugins/chat/assets/stylesheets/common/chat-transcript.scss
@@ -1,5 +1,6 @@
 .chat-transcript {
   @extend .chat-message-container;
+  box-sizing: border-box;
   min-height: 50px;
   padding: 12px;
   margin: 1rem 0;