diff --git a/Stack b/Stack
deleted file mode 160000
index 11244de..0000000
--- a/Stack
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 11244dec2627e2211dee9504044fb328496827b2
diff --git a/Stack/Libraries/Opc.Ua.Security.Certificates/Opc.Ua.Security.Certificates.csproj b/Stack/Libraries/Opc.Ua.Security.Certificates/Opc.Ua.Security.Certificates.csproj
new file mode 100644
index 0000000..a143b33
--- /dev/null
+++ b/Stack/Libraries/Opc.Ua.Security.Certificates/Opc.Ua.Security.Certificates.csproj
@@ -0,0 +1,61 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <AssemblyName>Opc.Ua.Security.Certificates</AssemblyName>
+    <TargetFrameworks>$(LibTargetFrameworks)</TargetFrameworks>
+    <PackageId>OPCFoundation.NetStandard.Opc.Ua.Security.Certificates</PackageId>
+    <RootNamespace>Opc.Ua.Security.Certificates</RootNamespace>
+    <Description>OPC UA Security X509 Certificates Class Library</Description>
+    <IsPackable>true</IsPackable>
+    <PackageLicenseExpression>MIT</PackageLicenseExpression>
+    <PackageLicenseFile></PackageLicenseFile>
+    <!-- currently the packages based on bouncy castle exposes additional API
+         so package validation is disabled to pass the build -->
+    <EnablePackageValidation>false</EnablePackageValidation>
+    <GenerateDocumentationFile>true</GenerateDocumentationFile>
+  </PropertyGroup>
+
+  <Choose>
+    <When Condition="'$(TargetFramework)' == 'net462'">
+      <ItemGroup>
+        <PackageReference Include="BouncyCastle.Cryptography" Version="2.2.1" />
+      </ItemGroup>
+    </When>
+    <When Condition="'$(TargetFramework)' == 'netstandard2.0'">
+      <ItemGroup>
+        <PackageReference Include="BouncyCastle.Cryptography" Version="2.2.1" />
+      </ItemGroup>
+    </When>
+    <Otherwise>
+      <PropertyGroup>
+        <DefineConstants>$(DefineConstants);ECC_SUPPORT</DefineConstants>
+      </PropertyGroup>
+      <ItemGroup>
+        <PackageReference Include="System.Security.Cryptography.Cng" Version="5.0.0" />
+      </ItemGroup>
+    </Otherwise>
+  </Choose>
+
+  <PropertyGroup Condition="'$(Configuration)' == 'Debug'">
+    <PackageId>$(PackageId).Debug</PackageId>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(SignAssembly)' == 'true'">
+    <DefineConstants>$(DefineConstants);SIGNASSEMBLY</DefineConstants>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="System.Formats.Asn1" Version="8.0.0" />
+  </ItemGroup>
+
+  <ItemGroup Condition="'$(TargetFramework)' == 'net472'">
+    <PackageReference Include="BouncyCastle.Cryptography" Version="2.3.0" />
+  </ItemGroup>
+
+  <ItemGroup Condition="'$(TargetFramework)' == 'net48'">
+    <PackageReference Include="BouncyCastle.Cryptography" Version="2.3.0" />
+  </ItemGroup>
+
+  <Target Name="GetPackagingOutputs" />
+
+</Project>