diff --git a/FontBuilder.pro b/FontBuilder.pro
index fd4cb2a..ee80a7c 100644
--- a/FontBuilder.pro
+++ b/FontBuilder.pro
@@ -73,8 +73,8 @@ SOURCES += src/main.cpp \
     src/layouters/gridlinelayouter.cpp \
     src/exporters/myguiexporter.cpp \
     src/exporters/bmfontexporter.cpp \
-    src/exporters/ageexporter.cpp \
-    src/exporters/jsonfontexporter.cpp
+    src/exporters/ageexporter.cpp 
+    
 
 HEADERS += src/fontbuilder.h \
     src/colorbutton.h \
@@ -118,8 +118,8 @@ HEADERS += src/fontbuilder.h \
     src/layouters/gridlinelayouter.h \
     src/exporters/myguiexporter.h \
     src/exporters/bmfontexporter.h \
-    src/exporters/ageexporter.h \
-    src/exporters/jsonfontexporter.h
+    src/exporters/ageexporter.h 
+    
 
 FORMS += src/fontbuilder.ui \
     src/fontselectframe.ui \
@@ -135,6 +135,8 @@ TRANSLATIONS = fontbuilder_en.ts \
 QT += xml
 
 greaterThan(QT_MAJOR_VERSION, 4) {
+    SOURCES += src/exporters/jsonfontexporter.cpp
+    HEADERS += src/exporters/jsonfontexporter.h
     QT += widgets
 }
 
diff --git a/src/exporterfactory.cpp b/src/exporterfactory.cpp
index 816e429..1c199d2 100644
--- a/src/exporterfactory.cpp
+++ b/src/exporterfactory.cpp
@@ -30,6 +30,7 @@
 
 #include "exporterfactory.h"
 
+#include <QtGlobal>
 
 extern AbstractExporter* GHLExporterFactoryFunc (QObject*);
 extern AbstractExporter* ZFIExporterFactoryFunc (QObject* parent);
@@ -42,8 +43,9 @@ extern AbstractExporter* SimpleExporterFactoryFunc (QObject*);
 extern AbstractExporter* MyGUIExporterFactoryFunc (QObject*);
 extern AbstractExporter* BMFontExporterFactoryFunc (QObject*);
 extern AbstractExporter* AGEExporterFactoryFunc (QObject*);
-extern AbstractExporter* JSONFontExporterFactoryFunc (QObject*);
-
+#if QT_VERSION >= 0x050000
+    extern AbstractExporter* JSONFontExporterFactoryFunc (QObject*);
+#endif
 ExporterFactory::ExporterFactory(QObject *parent) :
     QObject(parent)
 {
@@ -58,7 +60,9 @@ ExporterFactory::ExporterFactory(QObject *parent) :
     m_factorys["MyGUI"] = &MyGUIExporterFactoryFunc;
     m_factorys["BMFont"] = &BMFontExporterFactoryFunc;
     m_factorys["AGE"] = &AGEExporterFactoryFunc;
+#if QT_VERSION >= 0x050000
     m_factorys["JSON"] = &JSONFontExporterFactoryFunc;
+#endif
 }