diff --git a/lib/Controller/PageController.php b/lib/Controller/PageController.php
index 75aaa7e1ea..aef5fb8059 100644
--- a/lib/Controller/PageController.php
+++ b/lib/Controller/PageController.php
@@ -175,7 +175,7 @@ public function sign($uuid): TemplateResponse {
 		$response = new TemplateResponse(Application::APP_ID, 'external', [], TemplateResponse::RENDER_AS_BASE);
 
 		$policy = new ContentSecurityPolicy();
-		$policy->addAllowedFrameDomain('\'self\'');
+		$policy->allowEvalScript(true);
 		$response->setContentSecurityPolicy($policy);
 
 		return $response;
@@ -263,7 +263,7 @@ public function signAccountFile($uuid): TemplateResponse {
 		$response = new TemplateResponse(Application::APP_ID, 'external', [], TemplateResponse::RENDER_AS_BASE);
 
 		$policy = new ContentSecurityPolicy();
-		$policy->addAllowedFrameDomain('\'self\'');
+		$policy->allowEvalScript(true);
 		$response->setContentSecurityPolicy($policy);
 
 		return $response;