diff --git a/tools/server/webui/src/lib/components/app/chat/ChatAttachments/ChatAttachmentPreview.svelte b/tools/server/webui/src/lib/components/app/chat/ChatAttachments/ChatAttachmentPreview.svelte
index b5fe3fa9c4..0b0bf52ad9 100644
--- a/tools/server/webui/src/lib/components/app/chat/ChatAttachments/ChatAttachmentPreview.svelte
+++ b/tools/server/webui/src/lib/components/app/chat/ChatAttachments/ChatAttachmentPreview.svelte
@@ -241,7 +241,7 @@
 				</div>
 			{/if}
 		{:else if (isText || (isPdf && pdfViewMode === 'text')) && displayTextContent}
-			<SyntaxHighlightedCode code={displayTextContent} {language} maxWidth="69rem" />
+			<SyntaxHighlightedCode code={displayTextContent} {language} maxWidth="calc(69rem - 2rem)" />
 		{:else if isAudio}
 			<div class="flex items-center justify-center p-8">
 				<div class="w-full max-w-md text-center">
diff --git a/tools/server/webui/src/lib/components/app/misc/SyntaxHighlightedCode.svelte b/tools/server/webui/src/lib/components/app/misc/SyntaxHighlightedCode.svelte
index f36a9a20b9..bc42f9dd1e 100644
--- a/tools/server/webui/src/lib/components/app/misc/SyntaxHighlightedCode.svelte
+++ b/tools/server/webui/src/lib/components/app/misc/SyntaxHighlightedCode.svelte
@@ -72,9 +72,10 @@
 
 <div
 	class="code-preview-wrapper overflow-auto rounded-lg border border-border bg-muted {className}"
-	style="max-height: {maxHeight};"
+	style="max-height: {maxHeight}; max-width: {maxWidth};"
 >
-	<pre class="m-0 overflow-x-auto p-4 max-w-[{maxWidth}]"><code class="hljs text-sm leading-relaxed"
+	<!-- Needs to be formatted as single line for proper rendering -->
+	<pre class="m-0 overflow-x-auto p-4"><code class="hljs text-sm leading-relaxed"
 			>{@html highlightedHtml}</code
 		></pre>
 </div>