diff --git a/cryptdll.vcxproj b/cryptdll.vcxproj
index 51bc8841..f2589944 100644
--- a/cryptdll.vcxproj
+++ b/cryptdll.vcxproj
@@ -56,7 +56,7 @@
       <SuppressStartupBanner>true</SuppressStartupBanner>
       <ErrorReporting>None</ErrorReporting>
       <WarningLevel>Level4</WarningLevel>
-      <DisableSpecificWarnings>4231; 4355; 4505</DisableSpecificWarnings>
+      <DisableSpecificWarnings>4231; 4251; 4275; 4355; 4505</DisableSpecificWarnings>
       <PrecompiledHeader>Use</PrecompiledHeader>
       <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
     </ClCompile>
diff --git a/cryptest.vcxproj b/cryptest.vcxproj
index b7670ae7..5c121432 100644
--- a/cryptest.vcxproj
+++ b/cryptest.vcxproj
@@ -86,7 +86,7 @@
       <SuppressStartupBanner>true</SuppressStartupBanner>
       <ErrorReporting>None</ErrorReporting>
       <WarningLevel>Level4</WarningLevel>
-      <DisableSpecificWarnings>4231; 4355; 4505</DisableSpecificWarnings>
+      <DisableSpecificWarnings>4231; 4251; 4275; 4355; 4505</DisableSpecificWarnings>
       <PrecompiledHeader />
       <PrecompiledHeadeFile />
     </ClCompile>
diff --git a/cryptlib.vcxproj b/cryptlib.vcxproj
index 33d67dfa..acea306b 100644
--- a/cryptlib.vcxproj
+++ b/cryptlib.vcxproj
@@ -86,7 +86,7 @@
       <SuppressStartupBanner>true</SuppressStartupBanner>
       <ErrorReporting>None</ErrorReporting>
       <WarningLevel>Level4</WarningLevel>
-      <DisableSpecificWarnings>4231; 4355; 4505</DisableSpecificWarnings>
+      <DisableSpecificWarnings>4231; 4251; 4275; 4355; 4505</DisableSpecificWarnings>
       <PrecompiledHeader>Use</PrecompiledHeader>
       <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
     </ClCompile>
diff --git a/dlltest.vcxproj b/dlltest.vcxproj
index f7971456..ed0c8be7 100644
--- a/dlltest.vcxproj
+++ b/dlltest.vcxproj
@@ -54,7 +54,7 @@
       <SuppressStartupBanner>true</SuppressStartupBanner>
       <ErrorReporting>None</ErrorReporting>
       <WarningLevel>Level4</WarningLevel>
-      <DisableSpecificWarnings>4231; 4355; 4505</DisableSpecificWarnings>
+      <DisableSpecificWarnings>4231; 4251; 4275; 4355; 4505</DisableSpecificWarnings>
       <CallingConvention>StdCall</CallingConvention>
       <PrecompiledHeader />
     </ClCompile>