diff --git a/sdk/dotNet/SecretManagement.Keeper/SecretManagement.Keeper.Extension/SecretManagement.Keeper.Extension.psd1 b/sdk/dotNet/SecretManagement.Keeper/SecretManagement.Keeper.Extension/SecretManagement.Keeper.Extension.psd1
index ea4ea3c4..6a3ea847 100644
--- a/sdk/dotNet/SecretManagement.Keeper/SecretManagement.Keeper.Extension/SecretManagement.Keeper.Extension.psd1
+++ b/sdk/dotNet/SecretManagement.Keeper/SecretManagement.Keeper.Extension/SecretManagement.Keeper.Extension.psd1
@@ -1,5 +1,5 @@
 @{
-    ModuleVersion = '16.6.6'
+    ModuleVersion = '16.6.8'
     RootModule = 'SecretManagement.Keeper.Extension.psm1'
     RequiredAssemblies = '../SecretManagement.Keeper.dll'    
     CompatiblePSEditions = @('Core')
diff --git a/sdk/dotNet/SecretManagement.Keeper/SecretManagement.Keeper.Extension/SecretManagement.Keeper.Extension.psm1 b/sdk/dotNet/SecretManagement.Keeper/SecretManagement.Keeper.Extension/SecretManagement.Keeper.Extension.psm1
index 54dd4d56..5690b533 100644
--- a/sdk/dotNet/SecretManagement.Keeper/SecretManagement.Keeper.Extension/SecretManagement.Keeper.Extension.psm1
+++ b/sdk/dotNet/SecretManagement.Keeper/SecretManagement.Keeper.Extension/SecretManagement.Keeper.Extension.psm1
@@ -2,6 +2,11 @@ function Get-Config {
     param (
         [string] $LocalVaultName
     )
+    if ($PSVersionTable.PSVersion.Major -lt 6) {
+        Write-Error "Keeper Secrets Manager requires PowerShell version 6 or greater - version ($($PSVersionTable.PSVersion.ToString())) is not supported."
+        return $null
+    }
+
     $vaults = Microsoft.Powershell.SecretManagement\Get-SecretVault
     $localVault = $vaults.Where( { $_.Name -eq $LocalVaultName } ) # SecretStore/LocalStore
     if (!$localVault) {
diff --git a/sdk/dotNet/SecretManagement.Keeper/SecretManagement.Keeper.csproj b/sdk/dotNet/SecretManagement.Keeper/SecretManagement.Keeper.csproj
index e540d369..1e6c2eb0 100644
--- a/sdk/dotNet/SecretManagement.Keeper/SecretManagement.Keeper.csproj
+++ b/sdk/dotNet/SecretManagement.Keeper/SecretManagement.Keeper.csproj
@@ -4,8 +4,8 @@
         <TargetFramework>netstandard2.0</TargetFramework>
         <AssemblyName>SecretManagement.Keeper</AssemblyName>
         <CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>
-        <AssemblyVersion>16.6.7</AssemblyVersion>
-        <FileVersion>16.6.7</FileVersion>
+        <AssemblyVersion>16.6.8</AssemblyVersion>
+        <FileVersion>16.6.8</FileVersion>
     </PropertyGroup>
 
     <ItemGroup>
diff --git a/sdk/dotNet/SecretManagement.Keeper/SecretManagement.Keeper.psd1 b/sdk/dotNet/SecretManagement.Keeper/SecretManagement.Keeper.psd1
index 23ca6974..f270d1b4 100644
--- a/sdk/dotNet/SecretManagement.Keeper/SecretManagement.Keeper.psd1
+++ b/sdk/dotNet/SecretManagement.Keeper/SecretManagement.Keeper.psd1
@@ -1,5 +1,5 @@
 @{
-    ModuleVersion = '16.6.7'
+    ModuleVersion = '16.6.8'
     CompatiblePSEditions = @('Core')
     GUID = '20ab89cb-f0dd-4e8e-b276-f3a7708c1eb2'
     Author = 'Sergey Aldoukhov'
@@ -8,7 +8,7 @@
     Description = 'SecretManagement extension vault for Keeper'
     RootModule = './SecretManagement.Keeper.psm1'
     NestedModules = @('./SecretManagement.Keeper.Extension')
-    PowerShellVersion = '5.1'
+    PowerShellVersion = '6.0'
     FunctionsToExport = @('Register-KeeperVault')
     CmdletsToExport = @()
     VariablesToExport = @()
diff --git a/sdk/dotNet/SecretManagement.Keeper/SecretManagement.Keeper.psm1 b/sdk/dotNet/SecretManagement.Keeper/SecretManagement.Keeper.psm1
index 87c6401a..acc6ffaa 100644
--- a/sdk/dotNet/SecretManagement.Keeper/SecretManagement.Keeper.psm1
+++ b/sdk/dotNet/SecretManagement.Keeper/SecretManagement.Keeper.psm1
@@ -9,8 +9,8 @@ function Register-KeeperVault {
     [string] $Config,
     [string] $LocalVaultName
   )
-  if (($PSVersionTable.PSVersion.Major -lt 5) -or (($PSVersionTable.PSVersion.Major -eq 5) -and ($PSVersionTable.PSVersion.Minor -eq 0))) {
-    Write-Error "Keeper Secrets Manager: this version of Powershell ($($PSVersionTable.PSVersion.ToString())) is not supported"
+  if ($PSVersionTable.PSVersion.Major -lt 6) {
+    Write-Error "Keeper Secrets Manager requires PowerShell version 6 or greater - version ($($PSVersionTable.PSVersion.ToString())) is not supported."
     return
   }
   $vaults = Microsoft.Powershell.SecretManagement\Get-SecretVault
@@ -51,4 +51,4 @@ function Register-KeeperVault {
   Microsoft.Powershell.SecretManagement\Register-SecretVault -Name $Name -ModuleName SecretManagement.Keeper -VaultParameters $vaultParameters
   # for local testing
   # Microsoft.Powershell.SecretManagement\Register-SecretVault -Name $Name -ModuleName ./SecretManagement.Keeper.psd1 -VaultParameters $vaultParameters
-}
\ No newline at end of file
+}
diff --git a/sdk/dotNet/SecretsManager.Test.Core/SecretsManager.Test.Core.csproj b/sdk/dotNet/SecretsManager.Test.Core/SecretsManager.Test.Core.csproj
index 20aa10c6..9c99b75f 100644
--- a/sdk/dotNet/SecretsManager.Test.Core/SecretsManager.Test.Core.csproj
+++ b/sdk/dotNet/SecretsManager.Test.Core/SecretsManager.Test.Core.csproj
@@ -9,9 +9,9 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
-        <PackageReference Include="NUnit" Version="4.1.0" />
-        <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
+        <PackageReference Include="NUnit" Version="4.2.2" />
+        <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
         <PackageReference Include="coverlet.collector" Version="6.0.2">
           <PrivateAssets>all</PrivateAssets>
           <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/sdk/dotNet/SecretsManager/SecretsManager.csproj b/sdk/dotNet/SecretsManager/SecretsManager.csproj
index f4c18583..5e07b68b 100644
--- a/sdk/dotNet/SecretsManager/SecretsManager.csproj
+++ b/sdk/dotNet/SecretsManager/SecretsManager.csproj
@@ -5,9 +5,9 @@
         <LangVersion>9</LangVersion>
         <Company>Keeper Security Inc.</Company>
         <Product>SecretsManager .Net SDK</Product>
-        <AssemblyVersion>16.6.7</AssemblyVersion>
-        <FileVersion>16.6.7</FileVersion>
-        <PackageVersion>16.6.7</PackageVersion>
+        <AssemblyVersion>16.6.8</AssemblyVersion>
+        <FileVersion>16.6.8</FileVersion>
+        <PackageVersion>16.6.8</PackageVersion>
         <NeutralLanguage>en-US</NeutralLanguage>
         <PackageId>Keeper.SecretsManager</PackageId>
         <Authors>Sergey Aldoukhov</Authors>
@@ -23,7 +23,7 @@
 
     <ItemGroup>
       <PackageReference Include="BouncyCastle.Cryptography" Version="2.4.0" />
-      <PackageReference Include="System.Text.Json" Version="8.0.4" />
+      <PackageReference Include="System.Text.Json" Version="8.0.5" />
       <PackageReference Include="System.Text.Encodings.Web" Version="8.0.0" />
     </ItemGroup>