diff --git a/include/webserver_common.hpp b/include/webserver_common.hpp
index 1ba091b..4d88629 100644
--- a/include/webserver_common.hpp
+++ b/include/webserver_common.hpp
@@ -15,6 +15,7 @@
 */
 #pragma once
 
+#include "security_headers_middleware.hpp"
 #include "token_authorization_middleware.hpp"
 #include "security_headers_middleware.hpp"
 #include "webserver_common.hpp"
@@ -22,4 +23,3 @@
 using CrowApp = crow::App<crow::PersistentData::Middleware,
                           crow::TokenAuthorization::Middleware,
                           crow::SecurityHeadersMiddleware>;
-