diff --git a/packages/app/vite.js b/packages/app/vite.js
index e1f851653c..c66ed08dcc 100644
--- a/packages/app/vite.js
+++ b/packages/app/vite.js
@@ -31,6 +31,9 @@ export default [
         worker: {
           format: "es",
         },
+        optimizeDeps: {
+          exclude: ["@shikijs/stream", "katex", "marked", "marked-shiki", "remend"],
+        },
       }
     },
   },
diff --git a/packages/session-ui/src/components/markdown-worker.ts b/packages/session-ui/src/components/markdown-worker.ts
index abb0e3c9ca..568b4d8599 100644
--- a/packages/session-ui/src/components/markdown-worker.ts
+++ b/packages/session-ui/src/components/markdown-worker.ts
@@ -1,4 +1,3 @@
-import MarkdownWorkerUrl from "./markdown.worker.ts?worker&url"
 import {
   applyMarkdownWorkerResponse,
   shouldReleaseMarkdownWorkerState,
@@ -117,7 +116,7 @@ function getWorker() {
   if (worker) return worker
   if (disabled) throw new MarkdownWorkerUnavailableError(disabled.message)
   try {
-    worker = new Worker(MarkdownWorkerUrl, { type: "module" })
+    worker = new Worker(new URL("./markdown.worker.ts", import.meta.url), { type: "module" })
   } catch (error) {
     disabled = error instanceof Error ? error : new Error(String(error))
     throw new MarkdownWorkerUnavailableError(disabled.message)