diff --git a/frontend/package.json b/frontend/package.json
index 7e02152..33b82e8 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -4,7 +4,7 @@
   "private": true,
   "scripts": {
     "dev": "next dev",
-    "build": "next build",
+    "build": "next build --webpack",
     "start": "next start",
     "lint": "eslint"
   },
@@ -40,4 +40,4 @@
     "tailwindcss": "^4",
     "typescript": "^5"
   }
-}
+}
\ No newline at end of file
diff --git a/frontend/src/app/layout.tsx b/frontend/src/app/layout.tsx
index 9a74d28..8069c0b 100644
--- a/frontend/src/app/layout.tsx
+++ b/frontend/src/app/layout.tsx
@@ -3,6 +3,7 @@ import { GeistSans } from "geist/font/sans";
 import { GeistMono } from "geist/font/mono";
 import { QueryProvider } from "@/providers/query-provider";
 import { StacksProvider } from "@/providers/stacks-provider";
+import { StaleDeployGuard } from "@/components/stale-deploy-guard";
 import { Toaster } from "sonner";
 import "./globals.css";
 
@@ -28,6 +29,7 @@ export default function RootLayout({
         className={`${GeistSans.variable} ${GeistMono.variable} antialiased bg-surface-0 text-zinc-100`}
       >
         <QueryProvider>
+          <StaleDeployGuard />
           <StacksProvider>
             {children}
             <Toaster
diff --git a/frontend/src/components/stale-deploy-guard.tsx b/frontend/src/components/stale-deploy-guard.tsx
new file mode 100644
index 0000000..4679c49
--- /dev/null
+++ b/frontend/src/components/stale-deploy-guard.tsx
@@ -0,0 +1,55 @@
+"use client";
+
+/**
+ * Self-healing for tabs left open across deploys.
+ *
+ * Every deploy replaces the content-hashed chunk files, so a tab still
+ * running the previous build fails as soon as it lazily loads anything
+ * ("module factory is not available", ChunkLoadError, ...). The only correct
+ * recovery is reloading onto the new build — this guard does it once,
+ * automatically, instead of showing users module gibberish.
+ */
+
+import { useEffect } from "react";
+import { isStaleChunk } from "@/lib/wallet-errors";
+
+const RELOADED_AT_KEY = "stale-deploy-reloaded-at";
+const RELOAD_LOOP_WINDOW_MS = 30_000;
+
+function reloadOnceForNewDeploy() {
+  try {
+    const last = Number(sessionStorage.getItem(RELOADED_AT_KEY) ?? 0);
+    // If we already reloaded very recently, don't loop — the failure is
+    // something else (offline, blocked CDN) and reloading won't help.
+    if (Date.now() - last < RELOAD_LOOP_WINDOW_MS) return;
+    sessionStorage.setItem(RELOADED_AT_KEY, String(Date.now()));
+  } catch {
+    /* sessionStorage unavailable — still better to reload than stay broken */
+  }
+  window.location.reload();
+}
+
+export function StaleDeployGuard() {
+  useEffect(() => {
+    const onError = (event: ErrorEvent) => {
+      if (isStaleChunk(event.error ?? event.message)) {
+        event.preventDefault();
+        reloadOnceForNewDeploy();
+      }
+    };
+    const onRejection = (event: PromiseRejectionEvent) => {
+      if (isStaleChunk(event.reason)) {
+        event.preventDefault();
+        reloadOnceForNewDeploy();
+      }
+    };
+    window.addEventListener("error", onError);
+    window.addEventListener("unhandledrejection", onRejection);
+    return () => {
+      window.removeEventListener("error", onError);
+      window.removeEventListener("unhandledrejection", onRejection);
+    };
+  }, []);
+
+  return null;
+}
diff --git a/frontend/src/hooks/use-stacks-tx.ts b/frontend/src/hooks/use-stacks-tx.ts
index c66adc3..2eca699 100644
--- a/frontend/src/hooks/use-stacks-tx.ts
+++ b/frontend/src/hooks/use-stacks-tx.ts
@@ -5,7 +5,12 @@ import { useQueryClient } from "@tanstack/react-query";
 import { toast } from "sonner";
 import { PostConditionMode } from "@stacks/transactions";
 import { waitForTxConfirmation, clarityErrorMessage } from "@/lib/stacks";
-import { isUserCancel, isNoResponse, walletErrorDetail } from "@/lib/wallet-errors";
+import {
+  isUserCancel,
+  isNoResponse,
+  isStaleChunk,
+  walletErrorDetail,
+} from "@/lib/wallet-errors";
 
 type TxStatus = "idle" | "pending" | "confirming" | "success" | "error";
 
@@ -142,6 +147,13 @@ export function useStacksTx() {
           setStatus("idle");
           return null;
         }
+        if (isStaleChunk(err)) {
+          // A deploy replaced the bundle files under this open tab — reload
+          // onto the current build instead of surfacing module internals.
+          toast.info("StackStream was updated — refreshing…");
+          setTimeout(() => window.location.reload(), 800);
+          return null;
+        }
         setError(walletErrorDetail(err));
         setStatus("error");
         return null;
diff --git a/frontend/src/lib/wallet-errors.ts b/frontend/src/lib/wallet-errors.ts
index 4038792..310f030 100644
--- a/frontend/src/lib/wallet-errors.ts
+++ b/frontend/src/lib/wallet-errors.ts
@@ -45,3 +45,14 @@ export function walletErrorDetail(err: unknown): string {
   const msg = e.message?.slice(0, 140) ?? "Unknown error";
   return e.code !== undefined ? `${msg} (code ${e.code})` : msg;
 }
+
+/**
+ * A lazily-loaded chunk vanished because a new deploy replaced the hashed
+ * bundle files while this tab was still running the old build. The only
+ * correct recovery is a one-time page reload onto the new build.
+ */
+export function isStaleChunk(err: unknown): boolean {
+  return /module factory|ChunkLoadError|Loading chunk|Failed to fetch dynamically imported module|Importing a module script failed/i.test(
+    asErrorLike(err).message ?? ""
+  );
+}
diff --git a/frontend/src/providers/stacks-provider.tsx b/frontend/src/providers/stacks-provider.tsx
index 3920bba..0ccf043 100644
--- a/frontend/src/providers/stacks-provider.tsx
+++ b/frontend/src/providers/stacks-provider.tsx
@@ -24,6 +24,7 @@ import {
   isUserCancel,
   isNoResponse,
   isNoWalletFound,
+  isStaleChunk,
   walletErrorDetail,
 } from "@/lib/wallet-errors";
 
@@ -142,6 +143,13 @@ export function useStacksAuth() {
       );
     } catch (err) {
       console.error("[wallet connect]", err);
+      if (isStaleChunk(err)) {
+        // A deploy replaced the bundle files under this open tab — reload
+        // onto the current build instead of surfacing module internals.
+        toast.info("StackStream was updated — refreshing…");
+        setTimeout(() => window.location.reload(), 800);
+        return;
+      }
       toast.error(`Wallet connection failed: ${walletErrorDetail(err)}`, {
         duration: 8000,
       });