diff --git a/tools/keytools/sign.c b/tools/keytools/sign.c
index 77a3d4f4a..c13ad6136 100644
--- a/tools/keytools/sign.c
+++ b/tools/keytools/sign.c
@@ -1809,7 +1809,7 @@ static int base_diff(const char *f_base, uint8_t *pubkey, uint32_t pubkey_sz, in
     struct stat st;
     void *base = NULL;
     void *buffer = NULL;
-    uint8_t dest[WOLFBOOT_SECTOR_SIZE];
+    static uint8_t dest[WOLFBOOT_SECTOR_SIZE];
     uint8_t ff = 0xff;
     int r;
     uint32_t blksz = WOLFBOOT_SECTOR_SIZE;
@@ -1887,11 +1887,11 @@ static int base_diff(const char *f_base, uint8_t *pubkey, uint32_t pubkey_sz, in
 
     /* Retrieve the hash digest of the base image */
     if (CMD.hash_algo == HASH_SHA256)
-        base_hash_sz = sign_tool_find_header(base + 8, HDR_SHA256, &base_hash);
+        base_hash_sz = sign_tool_find_header((uint8_t*)base + 8, HDR_SHA256, &base_hash);
     else if (CMD.hash_algo == HASH_SHA384)
-        base_hash_sz = sign_tool_find_header(base + 8, HDR_SHA384, &base_hash);
+        base_hash_sz = sign_tool_find_header((uint8_t*)base + 8, HDR_SHA384, &base_hash);
     else if (CMD.hash_algo == HASH_SHA3)
-        base_hash_sz = sign_tool_find_header(base + 8, HDR_SHA3_384, &base_hash);
+        base_hash_sz = sign_tool_find_header((uint8_t*)base + 8, HDR_SHA3_384, &base_hash);
 
 #if HAVE_MMAP
     /* Open second image file */
@@ -2656,6 +2656,7 @@ int main(int argc, char** argv)
         CMD.fw_version = argv[i+2];
     }
 
+    memset(buf, 0, sizeof(buf));
     strncpy((char*)buf, CMD.image_file, sizeof(buf)-1);
     tmpstr = strrchr((char*)buf, '.');
     if (tmpstr) {
diff --git a/tools/keytools/wolfBootKeygenTool.vcxproj b/tools/keytools/wolfBootKeygenTool.vcxproj
index ec740ee8a..95d61a458 100644
--- a/tools/keytools/wolfBootKeygenTool.vcxproj
+++ b/tools/keytools/wolfBootKeygenTool.vcxproj
@@ -22,32 +22,32 @@
     <ProjectGuid>{599F7765-B224-41D4-AA56-597FFA9763BC}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>wolfBootKeygenTool</RootNamespace>
-    <WindowsTargetPlatformVersion>10.0.20348.0</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
diff --git a/tools/keytools/wolfBootSignTool.vcxproj b/tools/keytools/wolfBootSignTool.vcxproj
index f5a105066..fc5cdb2d4 100755
--- a/tools/keytools/wolfBootSignTool.vcxproj
+++ b/tools/keytools/wolfBootSignTool.vcxproj
@@ -22,32 +22,32 @@
     <ProjectGuid>{0E5B9C81-CA2B-47CA-BA83-074078CF3393}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>wolfBootSignTool</RootNamespace>
-    <WindowsTargetPlatformVersion>10.0.20348.0</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
@@ -92,8 +92,8 @@
       </PrecompiledHeader>
       <WarningLevel>Level3</WarningLevel>
       <Optimization>Disabled</Optimization>
-      <PreprocessorDefinitions>WOLFSSL_USER_SETTINGS;DELTA_UPDATES;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <AdditionalIncludeDirectories>.;../../lib/wolfssl;../../include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>WOLFSSL_USER_SETTINGS;DELTA_UPDATES;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>.;../../lib/wolfssl;../../include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -106,8 +106,8 @@
       </PrecompiledHeader>
       <WarningLevel>Level3</WarningLevel>
       <Optimization>Disabled</Optimization>
-      <PreprocessorDefinitions>WOLFSSL_USER_SETTINGS;DELTA_UPDATES;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <AdditionalIncludeDirectories>.;../../lib/wolfssl;../../include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>WOLFSSL_USER_SETTINGS;DELTA_UPDATES;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>.;../../lib/wolfssl;../../include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -122,8 +122,8 @@
       <Optimization>MaxSpeed</Optimization>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
-      <PreprocessorDefinitions>WOLFSSL_USER_SETTINGS;DELTA_UPDATES;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <AdditionalIncludeDirectories>.;../../lib/wolfssl;../../include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>WOLFSSL_USER_SETTINGS;DELTA_UPDATES;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>.;../../lib/wolfssl;../../include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -140,8 +140,8 @@
       <Optimization>MaxSpeed</Optimization>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
-      <PreprocessorDefinitions>WOLFSSL_USER_SETTINGS;DELTA_UPDATES;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <AdditionalIncludeDirectories>.;../../lib/wolfssl;../../include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>WOLFSSL_USER_SETTINGS;DELTA_UPDATES;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>.;../../lib/wolfssl;../../include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -151,7 +151,7 @@
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
-    <ClCompile Include="..\..\lib\wolfssl\wolfcrypt\src\aes.c" />
+    <ClCompile Include="..\..\lib\wolfssl\wolfcrypt\src\aes.c" />
     <ClCompile Include="..\..\lib\wolfssl\wolfcrypt\src\asn.c" />
     <ClCompile Include="..\..\lib\wolfssl\wolfcrypt\src\chacha.c" />
     <ClCompile Include="..\..\lib\wolfssl\wolfcrypt\src\coding.c" />