diff --git a/pages/_app.tsx b/pages/_app.tsx
index 2797c81..61b583b 100644
--- a/pages/_app.tsx
+++ b/pages/_app.tsx
@@ -17,7 +17,7 @@ type AppPropsWithLayout = AppProps & {
 
 // Check that PostHog is client-side (used to handle Next.js SSR)
 if (typeof window !== 'undefined') {
-  posthog.init(process.env.NEXT_PUBLIC_POSTHOG_KEY || '', {
+  posthog.init(process.env.NEXT_PUBLIC_POSTHOG_ID || '', {
     api_host: process.env.NEXT_PUBLIC_POSTHOG_HOST || 'https://app.posthog.com',
     // Enable debug mode in development
     loaded: (posthog) => {
@@ -46,4 +46,4 @@ export default function App({ Component, pageProps }: AppPropsWithLayout) {
       </Layout>
     </PostHogProvider>
   )
-}
\ No newline at end of file
+}