diff --git a/packages/session-ui/src/pierre/worker.ts b/packages/session-ui/src/pierre/worker.ts
index 1c1bebb40b5..9456bddc70a 100644
--- a/packages/session-ui/src/pierre/worker.ts
+++ b/packages/session-ui/src/pierre/worker.ts
@@ -24,7 +24,7 @@ function createPool(lineDiffType: "none" | "word-alt") {
     {
       theme: "OpenCode",
       lineDiffType,
-      preferredHighlighter: "shiki-wasm",
+      preferredHighlighter: "shiki-js",
     },
   )