diff --git a/editions/prerelease/tiddlers/system/TiddlyWiki Pre-release.tid b/editions/prerelease/tiddlers/system/TiddlyWiki Pre-release.tid
index b337a3ad1..f35234cbf 100644
--- a/editions/prerelease/tiddlers/system/TiddlyWiki Pre-release.tid	
+++ b/editions/prerelease/tiddlers/system/TiddlyWiki Pre-release.tid	
@@ -1,12 +1,18 @@
 title: TiddlyWiki Pre-release
 modified: 20230731122156493
 
-This is a pre-release build of TiddlyWiki provided for testing and review purposes. ''Please don't try to depend on the pre-release for anything important'' -- you should use the latest official release from https://tiddlywiki.com.
+<div class="tc-scary-warning">
+
+!!! This is a pre-release build of TiddlyWiki provided for testing and review purposes.
+
+''Please don't try to depend on the pre-release for anything important'' -- you should use the latest official release from https://tiddlywiki.com.
 
 All of the changes in this pre-release are provisional until it is released and they become frozen by our backwards compatibility policies. This is the perfect time to raise questions or make suggestions. Please [[open a ticket at GitHub|https://github.com/TiddlyWiki/TiddlyWiki5/issues/new/choose]] or make a post at https://talk.tiddlywiki.org/.
 
 The pre-release is also available as an [[empty wiki|https://tiddlywiki.com/prerelease/empty.html]] ready for reuse.
 
+</div>
+
 <$list filter="[tag[ReleaseNotes]!has[released]!sort[created]]">
 <div class="tc-titlebar">
 <h2 class="tc-title"><$text text=<<currentTiddler>>/></h2>
diff --git a/editions/prerelease/tiddlers/system/styles.tid b/editions/prerelease/tiddlers/system/styles.tid
new file mode 100644
index 000000000..2f63c5a48
--- /dev/null
+++ b/editions/prerelease/tiddlers/system/styles.tid
@@ -0,0 +1,17 @@
+tags: $:/tags/Stylesheet
+title: $:/_tw5.com/prerelease-styles
+type: text/vnd.tiddlywiki
+
+\rules only filteredtranscludeinline transcludeinline macrodef macrocallinline macrocallblock
+
+.tc-scary-warning {
+	font-weight: bold;
+	padding: 0 1em;
+	margin-left: -1em;
+	margin-right: -1em;
+	color: #f22;
+	border-radius: 4px;
+	border: 3px solid transparent;
+	background: #ffd;
+	background: linear-gradient(#ffd, #ffd) padding-box, repeating-linear-gradient(-45deg, red 0, red 25%, transparent 0, transparent 50%) 0 / .6em .6em;
+}
\ No newline at end of file