diff --git a/tutorial/netstd/Interfaces/Interfaces.csproj b/tutorial/netstd/Interfaces/Interfaces.csproj
index 68d8747..4ebeb4f 100644
--- a/tutorial/netstd/Interfaces/Interfaces.csproj
+++ b/tutorial/netstd/Interfaces/Interfaces.csproj
@@ -33,7 +33,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="System.ServiceModel.Primitives" Version="[4.4,)" />
+    <PackageReference Include="System.ServiceModel.Primitives" Version="4.5.3" />
   </ItemGroup>
 
   <Target Name="PreBuild" BeforeTargets="_GenerateRestoreProjectSpec;Restore;Compile">
diff --git a/tutorial/netstd/Server/Server.csproj b/tutorial/netstd/Server/Server.csproj
index 4b20a3b..fbc2c03 100644
--- a/tutorial/netstd/Server/Server.csproj
+++ b/tutorial/netstd/Server/Server.csproj
@@ -35,10 +35,10 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.AspNetCore" Version="[2.0,)" />
-    <PackageReference Include="Microsoft.AspNetCore.Server.IISIntegration" Version="[2.0,)" />
-    <PackageReference Include="Microsoft.AspNetCore.Server.Kestrel" Version="[2.0,)" />
-    <PackageReference Include="Microsoft.Extensions.Configuration.FileExtensions" Version="[2.0,)" />
+    <PackageReference Include="Microsoft.AspNetCore" Version="2.2.0" />
+    <PackageReference Include="Microsoft.AspNetCore.Server.IISIntegration" Version="2.2.1" />
+    <PackageReference Include="Microsoft.AspNetCore.Server.Kestrel" Version="2.2.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.FileExtensions" Version="2.2.0" />
   </ItemGroup>
 
 </Project>