diff --git a/nextjs/csp/policies/app.ts b/nextjs/csp/policies/app.ts
index 3f7be57274..5734f85a76 100644
--- a/nextjs/csp/policies/app.ts
+++ b/nextjs/csp/policies/app.ts
@@ -133,6 +133,10 @@ export function app(): CspDev.DirectiveDescriptor {
       '*',
     ],
 
+    'frame-ancestors': [
+      KEY_WORDS.SELF,
+    ],
+
     ...((() => {
       if (!config.features.sentry.isEnabled) {
         return {};