Use the plain include (<foo> instead of <bar/foo>)

src/libdanbooru/danbooru.h

@@ -23,10 +23,10 @@
 #ifndef DANBOORU_H
 #define DANBOORU_H
 
-#include <QtCore/QObject>
-
 #include "version.h"
 
+#include <QObject>
+
 /**
  * @brief The Danbooru namespace.
  * @file danbooru.h
@@ -68,6 +68,7 @@ namespace Danbooru {
     Q_DECLARE_FLAGS(Ratings, Rating)
     Q_DECLARE_OPERATORS_FOR_FLAGS(Ratings)
 
+
 }; // namespace Danbooru
 
 #endif // DANBOORU_H