X-Frame-Options was listed twice in the conflicting headers section

Author: oreoshake

lib/secure_headers/railtie.rb

@@ -3,7 +3,7 @@
   module SecureHeaders
     class Railtie < Rails::Railtie
       isolate_namespace SecureHeaders if defined? isolate_namespace # rails 3.0
-      conflicting_headers = ['X-Frame-Options', 'X-XSS-Protection', 'X-Content-Type-Options',
+      conflicting_headers = ['X-Frame-Options', 'X-XSS-Protection',
                              'X-Permitted-Cross-Domain-Policies', 'X-Download-Options',
                              'X-Content-Type-Options', 'Strict-Transport-Security',
                              'Content-Security-Policy', 'Content-Security-Policy-Report-Only',