diff --git a/ide/vs2017/mimalloc-override.vcxproj b/ide/vs2017/mimalloc-override.vcxproj
index 7d452b55..8a7f8463 100644
--- a/ide/vs2017/mimalloc-override.vcxproj
+++ b/ide/vs2017/mimalloc-override.vcxproj
@@ -146,7 +146,6 @@
       <Optimization>MaxSpeed</Optimization>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
-      <SDLCheck>true</SDLCheck>
       <ConformanceMode>true</ConformanceMode>
       <AdditionalIncludeDirectories>../../include</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>MI_SHARED_LIB;MI_SHARED_LIB_EXPORT;MI_MALLOC_OVERRIDE;%(PreprocessorDefinitions);NDEBUG</PreprocessorDefinitions>
@@ -155,6 +154,7 @@
       <WholeProgramOptimization>false</WholeProgramOptimization>
       <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
       <CompileAs>Default</CompileAs>
+      <BufferSecurityCheck>false</BufferSecurityCheck>
     </ClCompile>
     <Link>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
@@ -173,7 +173,6 @@
       <Optimization>MaxSpeed</Optimization>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
-      <SDLCheck>true</SDLCheck>
       <ConformanceMode>true</ConformanceMode>
       <AdditionalIncludeDirectories>../../include</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>MI_SHARED_LIB;MI_SHARED_LIB_EXPORT;MI_MALLOC_OVERRIDE;%(PreprocessorDefinitions);NDEBUG</PreprocessorDefinitions>
@@ -182,6 +181,7 @@
       <WholeProgramOptimization>false</WholeProgramOptimization>
       <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
       <CompileAs>Default</CompileAs>
+      <BufferSecurityCheck>false</BufferSecurityCheck>
     </ClCompile>
     <Link>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
diff --git a/ide/vs2017/mimalloc.vcxproj b/ide/vs2017/mimalloc.vcxproj
index 3e453471..854bf921 100644
--- a/ide/vs2017/mimalloc.vcxproj
+++ b/ide/vs2017/mimalloc.vcxproj
@@ -141,8 +141,6 @@
       <WarningLevel>Level3</WarningLevel>
       <Optimization>MaxSpeed</Optimization>
       <FunctionLevelLinking>true</FunctionLevelLinking>
-      <IntrinsicFunctions>true</IntrinsicFunctions>
-      <SDLCheck>true</SDLCheck>
       <ConformanceMode>true</ConformanceMode>
       <AdditionalIncludeDirectories>../../include</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>%(PreprocessorDefinitions);NDEBUG</PreprocessorDefinitions>
@@ -150,11 +148,9 @@
       <AssemblerListingLocation>$(IntDir)</AssemblerListingLocation>
       <WholeProgramOptimization>false</WholeProgramOptimization>
       <BufferSecurityCheck>false</BufferSecurityCheck>
-      <InlineFunctionExpansion>AnySuitable</InlineFunctionExpansion>
-      <FavorSizeOrSpeed>Neither</FavorSizeOrSpeed>
-      <OmitFramePointers>false</OmitFramePointers>
-      <EnableFiberSafeOptimizations>false</EnableFiberSafeOptimizations>
+      <InlineFunctionExpansion>Default</InlineFunctionExpansion>
       <CompileAs>CompileAsCpp</CompileAs>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
     </ClCompile>
     <Link>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
@@ -172,8 +168,6 @@
       <WarningLevel>Level3</WarningLevel>
       <Optimization>MaxSpeed</Optimization>
       <FunctionLevelLinking>true</FunctionLevelLinking>
-      <IntrinsicFunctions>true</IntrinsicFunctions>
-      <SDLCheck>true</SDLCheck>
       <ConformanceMode>true</ConformanceMode>
       <AdditionalIncludeDirectories>../../include</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>%(PreprocessorDefinitions);NDEBUG</PreprocessorDefinitions>
@@ -181,11 +175,9 @@
       <AssemblerListingLocation>$(IntDir)</AssemblerListingLocation>
       <WholeProgramOptimization>false</WholeProgramOptimization>
       <BufferSecurityCheck>false</BufferSecurityCheck>
-      <InlineFunctionExpansion>AnySuitable</InlineFunctionExpansion>
-      <FavorSizeOrSpeed>Neither</FavorSizeOrSpeed>
-      <OmitFramePointers>false</OmitFramePointers>
-      <EnableFiberSafeOptimizations>false</EnableFiberSafeOptimizations>
+      <InlineFunctionExpansion>Default</InlineFunctionExpansion>
       <CompileAs>CompileAsCpp</CompileAs>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
     </ClCompile>
     <Link>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>