diff --git a/cake/BuildExternals.cake b/cake/BuildExternals.cake
index a0d9e6a249..47ae94b72d 100644
--- a/cake/BuildExternals.cake
+++ b/cake/BuildExternals.cake
@@ -88,7 +88,7 @@ Task ("externals-windows")
             $"target_os='win' target_cpu='{skiaArch}' " +
             $"skia_use_icu=false skia_use_sfntly=false skia_use_piex=true skia_use_dng_sdk=true " +
             $"skia_use_system_expat=false skia_use_system_libjpeg_turbo=false skia_use_system_libpng=false skia_use_system_libwebp=false skia_use_system_zlib=false " +
-            $"extra_cflags=[ '-DSKIA_C_DLL', '/MD', '/EHsc', '/Z7' ] " +
+            $"extra_cflags=[ '-DSKIA_C_DLL', '/MT', '/EHsc', '/Z7' ] " +
             $"extra_ldflags=[ '/DEBUG:FULL' ]");
 
         // copy libSkiaSharp to output
diff --git a/native-builds/libHarfBuzzSharp_windows/libHarfBuzzSharp.vcxproj b/native-builds/libHarfBuzzSharp_windows/libHarfBuzzSharp.vcxproj
index c7e1e709a2..c3e5389054 100644
--- a/native-builds/libHarfBuzzSharp_windows/libHarfBuzzSharp.vcxproj
+++ b/native-builds/libHarfBuzzSharp_windows/libHarfBuzzSharp.vcxproj
@@ -222,6 +222,7 @@
       <PreprocessorDefinitions>HAVE_UCDN=1;HAVE_CONFIG_H;HB_EXTERN=__declspec (dllexport) extern;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;WIN32;_DEBUG;_WINDOWS;_USRDLL;HARFBUZZ_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <AdditionalIncludeDirectories>..\..\externals\harfbuzz\harfbuzz\src\hb-ucdn;$(ProjectDir);$(GeneratedFilesDir);$(IntDir);%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <DisableSpecificWarnings>4267;4244</DisableSpecificWarnings>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
@@ -236,6 +237,7 @@
       <PreprocessorDefinitions>HAVE_UCDN=1;HAVE_CONFIG_H;HB_EXTERN=__declspec (dllexport) extern;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;_DEBUG;_WINDOWS;_USRDLL;HARFBUZZ_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <AdditionalIncludeDirectories>..\..\externals\harfbuzz\harfbuzz\src\hb-ucdn;$(ProjectDir);$(GeneratedFilesDir);$(IntDir);%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <DisableSpecificWarnings>4267;4244</DisableSpecificWarnings>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
@@ -252,6 +254,7 @@
       <PreprocessorDefinitions>HAVE_UCDN=1;HAVE_CONFIG_H;HB_EXTERN=__declspec (dllexport) extern;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;WIN32;NDEBUG;_WINDOWS;_USRDLL;HARFBUZZ_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <AdditionalIncludeDirectories>..\..\externals\harfbuzz\harfbuzz\src\hb-ucdn;$(ProjectDir);$(GeneratedFilesDir);$(IntDir);%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <DisableSpecificWarnings>4267;4244</DisableSpecificWarnings>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
@@ -270,6 +273,7 @@
       <PreprocessorDefinitions>HAVE_UCDN=1;HAVE_CONFIG_H;HB_EXTERN=__declspec (dllexport) extern;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;NDEBUG;_WINDOWS;_USRDLL;HARFBUZZ_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <AdditionalIncludeDirectories>..\..\externals\harfbuzz\harfbuzz\src\hb-ucdn;$(ProjectDir);$(GeneratedFilesDir);$(IntDir);%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <DisableSpecificWarnings>4267;4244</DisableSpecificWarnings>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>