diff --git a/basics/next-app-router/README.md b/basics/next-app-router/README.md
index 4c14656..d0912d1 100644
--- a/basics/next-app-router/README.md
+++ b/basics/next-app-router/README.md
@@ -78,7 +78,7 @@ import posthog from "posthog-js"
 posthog.init(process.env.NEXT_PUBLIC_POSTHOG_KEY!, {
   api_host: "/ingest",
   ui_host: "https://us.posthog.com",
-  defaults: '2025-05-24',
+  defaults: '2025-11-30',
   capture_exceptions: true,
   debug: process.env.NODE_ENV === "development",
 });
diff --git a/basics/next-app-router/instrumentation-client.ts b/basics/next-app-router/instrumentation-client.ts
index 1fbcc33..628c99f 100644
--- a/basics/next-app-router/instrumentation-client.ts
+++ b/basics/next-app-router/instrumentation-client.ts
@@ -4,7 +4,7 @@ posthog.init(process.env.NEXT_PUBLIC_POSTHOG_KEY!, {
   api_host: "/ingest",
   ui_host: "https://us.posthog.com",
   // Include the defaults option as required by PostHog
-  defaults: '2025-05-24',
+  defaults: '2025-11-30',
   // Enables capturing unhandled exceptions via Error Tracking
   capture_exceptions: true,
   // Turn on debug in development mode
diff --git a/basics/next-pages-router/README.md b/basics/next-pages-router/README.md
index e935435..2bd59f1 100644
--- a/basics/next-pages-router/README.md
+++ b/basics/next-pages-router/README.md
@@ -77,7 +77,7 @@ import posthog from "posthog-js"
 posthog.init(process.env.NEXT_PUBLIC_POSTHOG_KEY!, {
   api_host: "/ingest",
   ui_host: "https://us.posthog.com",
-  defaults: '2025-05-24',
+  defaults: '2025-11-30',
   capture_exceptions: true,
   debug: process.env.NODE_ENV === "development",
 });
diff --git a/basics/next-pages-router/instrumentation-client.ts b/basics/next-pages-router/instrumentation-client.ts
index 1fbcc33..628c99f 100644
--- a/basics/next-pages-router/instrumentation-client.ts
+++ b/basics/next-pages-router/instrumentation-client.ts
@@ -4,7 +4,7 @@ posthog.init(process.env.NEXT_PUBLIC_POSTHOG_KEY!, {
   api_host: "/ingest",
   ui_host: "https://us.posthog.com",
   // Include the defaults option as required by PostHog
-  defaults: '2025-05-24',
+  defaults: '2025-11-30',
   // Enables capturing unhandled exceptions via Error Tracking
   capture_exceptions: true,
   // Turn on debug in development mode
diff --git a/basics/react-react-router/README.md b/basics/react-react-router/README.md
index 1f0b50b..bf85476 100644
--- a/basics/react-react-router/README.md
+++ b/basics/react-react-router/README.md
@@ -71,7 +71,7 @@ import posthog from "posthog-js"
 posthog.init(import.meta.env.VITE_POSTHOG_KEY!, {
   api_host: import.meta.env.VITE_POSTHOG_HOST,
   ui_host: import.meta.env.VITE_POSTHOG_HOST || "https://us.i.posthog.com",
-  person_profiles: 'identified_only',
+  defaults: '2025-11-30',
   capture_exceptions: true,
   debug: import.meta.env.DEV,
 });
diff --git a/basics/react-react-router/src/lib/posthog-client.ts b/basics/react-react-router/src/lib/posthog-client.ts
index fa25a05..cefb11c 100644
--- a/basics/react-react-router/src/lib/posthog-client.ts
+++ b/basics/react-react-router/src/lib/posthog-client.ts
@@ -6,7 +6,7 @@ if (typeof window !== 'undefined' && !posthog.__loaded) {
     api_host: "/ingest",
     ui_host: import.meta.env.VITE_POSTHOG_HOST || "https://us.i.posthog.com",
     // Include the defaults option as required by PostHog
-    person_profiles: 'identified_only',
+    defaults: '2025-11-30',
     // Enables capturing unhandled exceptions via Error Tracking
     capture_exceptions: true,
     // Turn on debug in development mode
diff --git a/basics/react-tanstack-router/README.md b/basics/react-tanstack-router/README.md
index c2de542..a486985 100644
--- a/basics/react-tanstack-router/README.md
+++ b/basics/react-tanstack-router/README.md
@@ -71,7 +71,7 @@ import posthog from "posthog-js"
 posthog.init(import.meta.env.VITE_POSTHOG_KEY!, {
   api_host: "/ingest",
   ui_host: import.meta.env.VITE_POSTHOG_HOST || "https://us.i.posthog.com",
-  person_profiles: 'identified_only',
+  defaults: '2025-11-30',
   capture_exceptions: true,
   debug: import.meta.env.DEV,
 });
diff --git a/basics/react-tanstack-router/src/lib/posthog-client.ts b/basics/react-tanstack-router/src/lib/posthog-client.ts
index fa25a05..cefb11c 100644
--- a/basics/react-tanstack-router/src/lib/posthog-client.ts
+++ b/basics/react-tanstack-router/src/lib/posthog-client.ts
@@ -6,7 +6,7 @@ if (typeof window !== 'undefined' && !posthog.__loaded) {
     api_host: "/ingest",
     ui_host: import.meta.env.VITE_POSTHOG_HOST || "https://us.i.posthog.com",
     // Include the defaults option as required by PostHog
-    person_profiles: 'identified_only',
+    defaults: '2025-11-30',
     // Enables capturing unhandled exceptions via Error Tracking
     capture_exceptions: true,
     // Turn on debug in development mode
diff --git a/basics/tanstack-start/README.md b/basics/tanstack-start/README.md
index a537c08..1c6d1a5 100644
--- a/basics/tanstack-start/README.md
+++ b/basics/tanstack-start/README.md
@@ -78,7 +78,7 @@ export function initPostHog() {
     posthog.init(import.meta.env.VITE_POSTHOG_KEY!, {
       api_host: '/ingest',
       ui_host: import.meta.env.VITE_POSTHOG_HOST || 'https://us.posthog.com',
-      defaults: '2025-05-24',
+      defaults: '2025-11-30',
       capture_exceptions: true,
       debug: import.meta.env.DEV,
       loaded: (posthog) => {
diff --git a/basics/tanstack-start/src/lib/posthog-client.ts b/basics/tanstack-start/src/lib/posthog-client.ts
index a4ebcfa..919b1a9 100644
--- a/basics/tanstack-start/src/lib/posthog-client.ts
+++ b/basics/tanstack-start/src/lib/posthog-client.ts
@@ -7,7 +7,7 @@ export function initPostHog() {
       api_host: '/ingest',
       ui_host: import.meta.env.VITE_POSTHOG_HOST || 'https://us.posthog.com',
       // Include the defaults option as required by PostHog
-      defaults: '2025-05-24',
+      defaults: '2025-11-30',
       // Enables capturing unhandled exceptions via Error Tracking
       capture_exceptions: true,
       // Turn on debug in development mode