diff --git a/cryptdll.vcxproj b/cryptdll.vcxproj
index 030affd4..7de90758 100644
--- a/cryptdll.vcxproj
+++ b/cryptdll.vcxproj
@@ -98,7 +98,7 @@ IF %ERRORLEVEL% EQU 0 (echo mac done > "$(OutDir)"\cryptopp.mac.done)
       <PrecompiledHeader>Use</PrecompiledHeader>
       <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
       <ProgramDataBaseFileName>$(OutDir)vc$(PlatformToolsetVersion).pdb</ProgramDataBaseFileName>
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>Level4</WarningLevel>
       <SuppressStartupBanner>true</SuppressStartupBanner>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
     </ClCompile>
@@ -138,7 +138,7 @@ IF %ERRORLEVEL% EQU 0 (echo mac done &gt; "$(OutDir)"\cryptopp.mac.done)
       <PrecompiledHeader>Use</PrecompiledHeader>
       <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
       <ProgramDataBaseFileName>$(OutDir)vc$(PlatformToolsetVersion).pdb</ProgramDataBaseFileName>
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>Level4</WarningLevel>
       <SuppressStartupBanner>true</SuppressStartupBanner>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
     </ClCompile>
@@ -176,7 +176,7 @@ IF %ERRORLEVEL% EQU 0 (echo mac done &gt; "$(OutDir)"\cryptopp.mac.done)
       <PrecompiledHeader>Use</PrecompiledHeader>
       <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
       <ProgramDataBaseFileName>$(OutDir)vc$(PlatformToolsetVersion).pdb</ProgramDataBaseFileName>
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>Level4</WarningLevel>
       <SuppressStartupBanner>true</SuppressStartupBanner>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
     </ClCompile>
@@ -212,7 +212,7 @@ IF %ERRORLEVEL% EQU 0 (echo mac done &gt; "$(OutDir)"\cryptopp.mac.done)
       <PrecompiledHeader>Use</PrecompiledHeader>
       <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
       <ProgramDataBaseFileName>$(OutDir)vc$(PlatformToolsetVersion).pdb</ProgramDataBaseFileName>
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>Level4</WarningLevel>
       <SuppressStartupBanner>true</SuppressStartupBanner>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
     </ClCompile>
diff --git a/cryptest.vcxproj b/cryptest.vcxproj
index 9e07d1ba..3f1c509f 100644
--- a/cryptest.vcxproj
+++ b/cryptest.vcxproj
@@ -144,7 +144,7 @@
       <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <PrecompiledHeader />
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>Level4</WarningLevel>
       <SuppressStartupBanner>true</SuppressStartupBanner>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
     </ClCompile>
@@ -174,7 +174,7 @@
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <EnableEnhancedInstructionSet>NotSet</EnableEnhancedInstructionSet>
       <PrecompiledHeader />
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>Level4</WarningLevel>
       <SuppressStartupBanner>true</SuppressStartupBanner>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
     </ClCompile>
@@ -204,7 +204,7 @@
       <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <PrecompiledHeader />
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>Level4</WarningLevel>
       <SuppressStartupBanner>true</SuppressStartupBanner>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
     </ClCompile>
@@ -241,7 +241,7 @@ echo unless it undergoes FIPS validation.
       <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <PrecompiledHeader />
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>Level4</WarningLevel>
       <SuppressStartupBanner>true</SuppressStartupBanner>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
     </ClCompile>
@@ -276,7 +276,7 @@ echo unless it undergoes FIPS validation.
       <PreprocessorDefinitions>CRYPTOPP_IMPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
       <PrecompiledHeader />
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>Level4</WarningLevel>
       <SuppressStartupBanner>true</SuppressStartupBanner>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
     </ClCompile>
@@ -308,7 +308,7 @@ echo unless it undergoes FIPS validation.
       <PreprocessorDefinitions>CRYPTOPP_IMPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
       <PrecompiledHeader />
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>Level4</WarningLevel>
       <SuppressStartupBanner>true</SuppressStartupBanner>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
     </ClCompile>
@@ -341,7 +341,7 @@ echo unless it undergoes FIPS validation.
       <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
       <EnableEnhancedInstructionSet>StreamingSIMDExtensions</EnableEnhancedInstructionSet>
       <PrecompiledHeader />
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>Level4</WarningLevel>
       <SuppressStartupBanner>true</SuppressStartupBanner>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
     </ClCompile>
@@ -364,7 +364,7 @@ echo unless it undergoes FIPS validation.
       <PreprocessorDefinitions>%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
       <PrecompiledHeader />
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>Level4</WarningLevel>
       <SuppressStartupBanner>true</SuppressStartupBanner>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
     </ClCompile>
diff --git a/dlltest.vcxproj b/dlltest.vcxproj
index 8a7b17d8..935637f3 100644
--- a/dlltest.vcxproj
+++ b/dlltest.vcxproj
@@ -85,7 +85,7 @@
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <EnableEnhancedInstructionSet>StreamingSIMDExtensions</EnableEnhancedInstructionSet>
       <PrecompiledHeader />
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>Level4</WarningLevel>
       <SuppressStartupBanner>true</SuppressStartupBanner>
       <CallingConvention>StdCall</CallingConvention>
     </ClCompile>
@@ -113,7 +113,7 @@
       <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <PrecompiledHeader />
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>Level4</WarningLevel>
       <SuppressStartupBanner>true</SuppressStartupBanner>
       <CallingConvention>StdCall</CallingConvention>
     </ClCompile>
@@ -139,7 +139,7 @@
       <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
       <EnableEnhancedInstructionSet>StreamingSIMDExtensions</EnableEnhancedInstructionSet>
       <PrecompiledHeader />
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>Level4</WarningLevel>
       <SuppressStartupBanner>true</SuppressStartupBanner>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
       <CallingConvention>StdCall</CallingConvention>
@@ -164,7 +164,7 @@
       <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
       <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
       <PrecompiledHeader />
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>Level4</WarningLevel>
       <SuppressStartupBanner>true</SuppressStartupBanner>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
       <CallingConvention>StdCall</CallingConvention>