diff --git a/res/tools/wupdate.exe b/res/tools/wupdate.exe
index 47b4a196..4d21ed47 100644
Binary files a/res/tools/wupdate.exe and b/res/tools/wupdate.exe differ
diff --git a/src/Config.h b/src/Config.h
index 971c7bfb..70c31ee9 100644
--- a/src/Config.h
+++ b/src/Config.h
@@ -35,7 +35,7 @@
 #define VER_LAMEXP_MINOR_LO					2
 #define VER_LAMEXP_TYPE						Beta
 #define VER_LAMEXP_PATCH					3
-#define VER_LAMEXP_BUILD					1782
+#define VER_LAMEXP_BUILD					1781
 #define VER_LAMEXP_CONFG					1700
 
 ///////////////////////////////////////////////////////////////////////////////
diff --git a/src/Dialog_Update.cpp b/src/Dialog_Update.cpp
index 8e1d9720..6558cdbc 100644
--- a/src/Dialog_Update.cpp
+++ b/src/Dialog_Update.cpp
@@ -396,7 +396,8 @@ void UpdateDialog::applyUpdate(void)
 		args << QString("/Location=%1").arg(updateInfo->getDownloadAddress());
 		args << QString("/Filename=%1").arg(updateInfo->getDownloadFilename());
 		args << QString("/TicketID=%1").arg(updateInfo->getDownloadFilecode());
-		args << QString("/ToFolder=%1").arg(QDir::toNativeSeparators(QDir(QApplication::applicationDirPath()).canonicalPath())); 
+		args << QString("/CheckSum=%1").arg(updateInfo->getDownloadChecksum());
+		args << QString("/ToFolder=%1").arg(QDir::toNativeSeparators(QDir(QApplication::applicationDirPath()).canonicalPath()));
 		args << QString("/ToExFile=%1.exe").arg(QFileInfo(QFileInfo(QApplication::applicationFilePath()).canonicalFilePath()).completeBaseName());
 		args << QString("/AppTitle=LameXP (Build #%1)").arg(QString::number(updateInfo->getBuildNo()));
 
diff --git a/src/Tools.h b/src/Tools.h
index 4526759f..1ca002f9 100644
--- a/src/Tools.h
+++ b/src/Tools.h
@@ -92,7 +92,7 @@ g_lamexp_tools[] =
 	{"9e1ade2137ea5cee0ad4657971c314a372df3068594fbe4f77d45b9eb65fa7c69e55027b0df81b6fe072a220e9a8ba8a", CPU_TYPE_ALL_ALL, "valdec.exe", 100, "a"},
 	{"509df39fdd7033b0f1af831304d0d6c08b74d5a48e2c038857a78b9dfaa4fb83c6b5c7ea202ba2270c0384607f2316ee", CPU_TYPE_ALL_ALL, "wget.exe", 1140, ""},
 	{"572b9448bf4a338ecb9727951fdfcc5a219cc69896695cc96b9f6b083690e339910e41558968264a38992e45f2be152c", CPU_TYPE_ALL_ALL, "wma2wav.exe", 20111001, ""},
-	{"832b2be006c26f8b5300be0f2485dbfae4373e54f71d302870671a75a34b428b4e3feb387a2420042fb6286826d4fed7", CPU_TYPE_ALL_ALL, "wupdate.exe", 20150514, ""},
+	{"e395c342486de34b3b049ef5800c7590b1da4583e16df74a51cb79cdfcf3f606ce5819ba050f7841c75f05809fd59ef7", CPU_TYPE_ALL_ALL, "wupdate.exe", 20150816, ""},
 	{"221efeabe47e9bf65404c4687df156b326b4fd244d910ef937213e6b0169a57350e897140a2e9965822d60aada609f79", CPU_TYPE_ALL_ALL, "wvunpack.exe", 4700, ""},
 	{NULL, NULL, NULL, NULL, NULL}
 };