diff --git a/apps/web/next.config.ts b/apps/web/next.config.ts
index 8ee077a..c087caf 100644
--- a/apps/web/next.config.ts
+++ b/apps/web/next.config.ts
@@ -45,10 +45,12 @@ const nextConfig: NextConfig = {
   },
 };
 
-export default withSentryConfig(nextConfig, {
-  silent: true,
-  sourcemaps: {
-    disable: true,
-  },
-  telemetry: false,
-});
+// Only wrap with Sentry in production — the worker.js crash in dev mode
+// (vendor-chunks/lib/worker.js MODULE_NOT_FOUND) makes the dev server unstable
+export default process.env.NODE_ENV === "production"
+  ? withSentryConfig(nextConfig, {
+      silent: true,
+      sourcemaps: { disable: true },
+      telemetry: false,
+    })
+  : nextConfig;
diff --git a/apps/web/src/instrumentation.ts b/apps/web/src/instrumentation.ts
index 4df5ea8..3ee6217 100644
--- a/apps/web/src/instrumentation.ts
+++ b/apps/web/src/instrumentation.ts
@@ -1,12 +1,19 @@
-import * as Sentry from "@sentry/nextjs";
-
 export async function register() {
-  if (process.env.NEXT_RUNTIME === "nodejs") {
-    await import("../sentry.server.config");
-  }
-  if (process.env.NEXT_RUNTIME === "edge") {
-    await import("../sentry.edge.config");
+  // Only load Sentry in production — the worker.js crash in dev mode
+  // (vendor-chunks/lib/worker.js MODULE_NOT_FOUND) makes the dev server unstable
+  if (process.env.NODE_ENV === "production") {
+    if (process.env.NEXT_RUNTIME === "nodejs") {
+      await import("../sentry.server.config");
+    }
+    if (process.env.NEXT_RUNTIME === "edge") {
+      await import("../sentry.edge.config");
+    }
   }
 }
 
-export const onRequestError = Sentry.captureRequestError;
+export async function onRequestError(...args: unknown[]) {
+  if (process.env.NODE_ENV === "production") {
+    const Sentry = await import("@sentry/nextjs");
+    (Sentry.captureRequestError as Function)(...args);
+  }
+}