diff --git a/src/gateway/control-ui-csp.ts b/src/gateway/control-ui-csp.ts
index 8a7b56f..62b0dfd 100644
--- a/src/gateway/control-ui-csp.ts
+++ b/src/gateway/control-ui-csp.ts
@@ -7,8 +7,8 @@ export function buildControlUiCspHeader(): string {
     "default-src 'self'",
     "base-uri 'none'",
     "object-src 'none'",
-    "frame-ancestors 'none'",
+    "frame-ancestors 'self' https://huggingface.co https://*.hf.space",
     "script-src 'self'",
     "style-src 'self' 'unsafe-inline' https://fonts.googleapis.com",
     "img-src 'self' data: https:",
     "font-src 'self' https://fonts.gstatic.com",
diff --git a/src/gateway/control-ui.ts b/src/gateway/control-ui.ts
index ed7b733..7cc0ab9 100644
--- a/src/gateway/control-ui.ts
+++ b/src/gateway/control-ui.ts
@@ -98,7 +98,8 @@ type ControlUiAvatarMeta = {
 };
 
 function applyControlUiSecurityHeaders(res: ServerResponse) {
-  res.setHeader("X-Frame-Options", "DENY");
+  // Allow embedding in HF Spaces iframes (X-Frame-Options removed, CSP frame-ancestors used instead)
+  // res.setHeader("X-Frame-Options", "DENY");
   res.setHeader("Content-Security-Policy", buildControlUiCspHeader());
   res.setHeader("X-Content-Type-Options", "nosniff");
   res.setHeader("Referrer-Policy", "no-referrer");