diff --git a/src/index.tsx b/src/index.tsx
index 45a52fe..f433e74 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -34,10 +34,11 @@ const DashboardPage = lazy(() => import("./pages/dashboard"));
 
 import Faq from "@/faq.md";
 
+const hasWasm = "WebAssembly" in globalThis;
 const db = new SnortSystemDb();
 const System = new NostrSystem({
   db,
-  optimizer: WasmOptimizer
+  optimizer: hasWasm ? WasmOptimizer : undefined
 });
 export const Login = new LoginStore();
 
@@ -50,7 +51,9 @@ Object.entries(defaultRelays).forEach(params => {
 
 export let TimeSync = 0;
 async function doInit() {
-  await wasmInit(WasmPath)
+  if (hasWasm) {
+    await wasmInit(WasmPath)
+  }
   db.ready = await db.isAvailable();
   await System.Init();
   try {