diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7f4730e..ea0f03c 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,12 +1,10 @@
 cmake_minimum_required(VERSION 2.4)
 project(MasterPatch)
 
-find_package(Qt4 REQUIRED)
-include(${QT_USE_FILE})
-include_directories(${QT_INCLUDES})
+find_package(Qt5 COMPONENTS Widgets REQUIRED)
 include_directories(${CMAKE_CURRENT_BINARY_DIR})
 
-qt4_wrap_ui(UI_FILES
+qt5_wrap_ui(UI_FILES
 	main.ui
 )
 
@@ -21,4 +19,4 @@ add_executable(patch WIN32
 	patcher.cpp
 )
 
-target_link_libraries(patch ${QT_LIBRARIES})
+target_link_libraries(patch Qt5::Widgets)
diff --git a/main.cpp b/main.cpp
index 438037d..d76801b 100755
--- a/main.cpp
+++ b/main.cpp
@@ -72,7 +72,7 @@ void MainWindow::done(QAbstractButton *button)
 		if(out.isEmpty())
 			return;
 
-		QString ret = Patcher::patch(path.toAscii().constData(), out.toAscii().constData(), (Patcher::MapProgression)mapBox->currentIndex(), (Patcher::MusicSelections)musicBox->currentIndex(), doomWad, doom2Wad);
+		QString ret = Patcher::patch(path.toUtf8().constData(), out.toUtf8().constData(), (Patcher::MapProgression)mapBox->currentIndex(), (Patcher::MusicSelections)musicBox->currentIndex(), doomWad, doom2Wad);
 		if(ret.isEmpty())
 		{
 			QMessageBox::information(this, tr("Done"), tr("The patching process has been completed!"));
diff --git a/patcher.cpp b/patcher.cpp
index 2c218b7..9ffa23f 100755
--- a/patcher.cpp
+++ b/patcher.cpp
@@ -622,7 +622,7 @@ QString Patcher::patch(const char* in, const char* out, Patcher::MapProgression
 	for(unsigned int i = 0;i < NUM_FILES;i++)
 	{
 		QString path = QString(in) + "/" + files[i];
-		WadFile *file = WadFile::FromFile(path.toAscii());
+		WadFile *file = WadFile::FromFile(path.toUtf8());
 		if(file == NULL)
 			return QString("Could not read \"") + files[i] + "\"";
 
@@ -660,8 +660,8 @@ QString Patcher::patch(const char* in, const char* out, Patcher::MapProgression
 				oldName = "MAP01";
 				break;
 		}
-		file->RenameLump(oldName, mapName.toAscii());
-		output << file->GetLump(mapName.toAscii());
+		file->RenameLump(oldName, mapName.toUtf8());
+		output << file->GetLump(mapName.toUtf8());
 		output << file->GetLump("THINGS");
 		output << file->GetLump("LINEDEFS");
 		output << file->GetLump("SIDEDEFS");
@@ -725,12 +725,12 @@ QString Patcher::patch(const char* in, const char* out, Patcher::MapProgression
 	else
 		mapinfoData = mapinfoData.arg(11).arg(11).arg(11).arg(clusterinfo).arg("SKY1");
 
-	output.AddLump("MAPINFO", mapinfoData.length(), (const unsigned char*)mapinfoData.toAscii().constData());
+	output.AddLump("MAPINFO", mapinfoData.length(), (const unsigned char*)mapinfoData.toUtf8().constData());
 	output.AddLump("LANGUAGE", sizeof(language), language);
 
 	if(musicSelections == Patcher::MS_XASERPICKS || musicSelections == Patcher::MS_BLZUT3PICKS)
 	{
-		WadFile *extraFile = WadFile::FromFile(doom2Wad.toAscii());
+		WadFile *extraFile = WadFile::FromFile(doom2Wad.toUtf8());
 		extraFile->RenameLump("D_DM2INT", "D_INTDM2");
 		output << extraFile->GetLump("D_INTDM2");
 		if(musicSelections == Patcher::MS_XASERPICKS)
@@ -743,7 +743,7 @@ QString Patcher::patch(const char* in, const char* out, Patcher::MapProgression
 
 	if(musicSelections == Patcher::MS_XASERPICKS)
 	{
-		WadFile *extraFile = WadFile::FromFile(doomWad.toAscii());
+		WadFile *extraFile = WadFile::FromFile(doomWad.toUtf8());
 		output << extraFile->GetLump("D_E1M5");
 		output << extraFile->GetLump("D_E1M7");
 		output << extraFile->GetLump("D_E1M8");