diff --git a/resources/celerity/map.php b/resources/celerity/map.php
--- a/resources/celerity/map.php
+++ b/resources/celerity/map.php
@@ -45,7 +45,7 @@
     'rsrc/css/application/config/unhandled-exception.css' => '37d4f9a2',
     'rsrc/css/application/conpherence/durable-column.css' => '51c1e074',
     'rsrc/css/application/conpherence/menu.css' => 'f389e048',
-    'rsrc/css/application/conpherence/message-pane.css' => '970dce25',
+    'rsrc/css/application/conpherence/message-pane.css' => '18ac5e85',
     'rsrc/css/application/conpherence/notification.css' => 'd208f806',
     'rsrc/css/application/conpherence/transaction.css' => '25138b7f',
     'rsrc/css/application/conpherence/update.css' => '1099a660',
@@ -517,7 +517,7 @@
     'config-welcome-css' => '6abd79be',
     'conpherence-durable-column-view' => '51c1e074',
     'conpherence-menu-css' => 'f389e048',
-    'conpherence-message-pane-css' => '970dce25',
+    'conpherence-message-pane-css' => '18ac5e85',
     'conpherence-notification-css' => 'd208f806',
     'conpherence-thread-manager' => '0a5192c4',
     'conpherence-transaction-css' => '25138b7f',
diff --git a/webroot/rsrc/css/application/conpherence/message-pane.css b/webroot/rsrc/css/application/conpherence/message-pane.css
--- a/webroot/rsrc/css/application/conpherence/message-pane.css
+++ b/webroot/rsrc/css/application/conpherence/message-pane.css
@@ -329,4 +329,5 @@
 .device .conpherence-message-pane .aphront-form-control-textarea {
   float: left;
   height: 24px;
+  width: 100%;
 }