diff --git a/include/redfish_v1.hpp b/include/redfish_v1.hpp
index 1e4bd65..4230b5f 100644
--- a/include/redfish_v1.hpp
+++ b/include/redfish_v1.hpp
@@ -1,6 +1,6 @@
 #pragma once
 
-#include <app.h>
+#include <app.hpp>
 
 namespace crow
 {