diff --git a/apps/web/src/components/ChatMarkdown.tsx b/apps/web/src/components/ChatMarkdown.tsx
index dc51bef4426320430192a5dcd9d9b004c38ef553..38fe42aac3da4a7d253f561d627acdbaefbb0e7b 100644
--- a/apps/web/src/components/ChatMarkdown.tsx
+++ b/apps/web/src/components/ChatMarkdown.tsx
@@ -96,7 +96,7 @@ function getHighlighterPromise(language: string): Promise<DiffsHighlighter> {
   if (cached) return cached;
 
   const promise = getSharedHighlighter({
-    themes: ["pierre-dark", "pierre-light"],
+    themes: [resolveDiffThemeName("dark"), resolveDiffThemeName("light")],
     langs: [language as SupportedLanguages],
     preferredHighlighter: "shiki-js",
   });