diff --git a/etc/Prerequisites/keccak/QKeccakHash_VS2012.vcxproj b/etc/Prerequisites/keccak/QKeccakHash_VS2012.vcxproj
index 4b02bce0..f415f349 100644
--- a/etc/Prerequisites/keccak/QKeccakHash_VS2012.vcxproj
+++ b/etc/Prerequisites/keccak/QKeccakHash_VS2012.vcxproj
@@ -91,6 +91,7 @@
       <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;QT_LARGEFILE_SUPPORT;QT_GUI_LIB;QT_CORE_LIB;QT_THREAD_SUPPORT;QT_DLL;QT_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <AdditionalIncludeDirectories>$(SolutionDir)\include;$(QTDIR)\include;$(QTDIR)\include\QtCore;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+      <EnableEnhancedInstructionSet>NoExtensions</EnableEnhancedInstructionSet>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
@@ -111,7 +112,7 @@
       <OmitFramePointers>true</OmitFramePointers>
       <WholeProgramOptimization>true</WholeProgramOptimization>
       <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
-      <EnableEnhancedInstructionSet>NotSet</EnableEnhancedInstructionSet>
+      <EnableEnhancedInstructionSet>NoExtensions</EnableEnhancedInstructionSet>
       <CreateHotpatchableImage>false</CreateHotpatchableImage>
     </ClCompile>
     <Link>
@@ -138,7 +139,7 @@
       <OmitFramePointers>true</OmitFramePointers>
       <WholeProgramOptimization>true</WholeProgramOptimization>
       <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
-      <EnableEnhancedInstructionSet>NotSet</EnableEnhancedInstructionSet>
+      <EnableEnhancedInstructionSet>NoExtensions</EnableEnhancedInstructionSet>
       <CreateHotpatchableImage>false</CreateHotpatchableImage>
     </ClCompile>
     <Link>
diff --git a/etc/Prerequisites/keccak/lib/Debug/QKeccakHash_VS2012.lib b/etc/Prerequisites/keccak/lib/Debug/QKeccakHash_VS2012.lib
index e4532626..45884268 100644
Binary files a/etc/Prerequisites/keccak/lib/Debug/QKeccakHash_VS2012.lib and b/etc/Prerequisites/keccak/lib/Debug/QKeccakHash_VS2012.lib differ
diff --git a/etc/Prerequisites/keccak/lib/Release/QKeccakHash_VS2012.lib b/etc/Prerequisites/keccak/lib/Release/QKeccakHash_VS2012.lib
index 3624ed44..120bfe36 100644
Binary files a/etc/Prerequisites/keccak/lib/Release/QKeccakHash_VS2012.lib and b/etc/Prerequisites/keccak/lib/Release/QKeccakHash_VS2012.lib differ
diff --git a/etc/Prerequisites/keccak/lib/Release_Static/QKeccakHash_VS2012.lib b/etc/Prerequisites/keccak/lib/Release_Static/QKeccakHash_VS2012.lib
index 204297e2..049227ff 100644
Binary files a/etc/Prerequisites/keccak/lib/Release_Static/QKeccakHash_VS2012.lib and b/etc/Prerequisites/keccak/lib/Release_Static/QKeccakHash_VS2012.lib differ
diff --git a/src/Config.h b/src/Config.h
index cece7bc7..d61e0e1a 100644
--- a/src/Config.h
+++ b/src/Config.h
@@ -30,7 +30,7 @@
 #define VER_LAMEXP_MINOR_LO					7
 #define VER_LAMEXP_TYPE						Beta
 #define VER_LAMEXP_PATCH					6
-#define VER_LAMEXP_BUILD					1246
+#define VER_LAMEXP_BUILD					1247
 
 ///////////////////////////////////////////////////////////////////////////////
 // Tool versions (minimum expected versions!)