diff --git a/webroot/rsrc/css/application/conpherence/message-pane.css b/webroot/rsrc/css/application/conpherence/message-pane.css
index 9e1870ff2e..7ab6797dd2 100644
--- a/webroot/rsrc/css/application/conpherence/message-pane.css
+++ b/webroot/rsrc/css/application/conpherence/message-pane.css
@@ -128,6 +128,7 @@
   box-sizing: border-box;
   -moz-box-sizing: border-box;
   -webkit-box-sizing: border-box;
+  resize: none;
 }
 
 .device .conpherence-message-pane .remarkup-assist-textarea {