diff --git a/src/index.scss b/src/index.scss
index 7537bc8..50e5908 100644
--- a/src/index.scss
+++ b/src/index.scss
@@ -52,6 +52,7 @@ $alert-themes:
 
 .cdx-alert__message {
   outline: none;
+  -webkit-user-modify: read-write-plaintext-only;
 }
 
 .cdx-alert [contentEditable='true'][data-placeholder] {