diff --git a/vs4win/Chapter04/Instrumenting/Instrumenting.csproj b/vs4win/Chapter04/Instrumenting/Instrumenting.csproj
index b879c25..859438d 100644
--- a/vs4win/Chapter04/Instrumenting/Instrumenting.csproj
+++ b/vs4win/Chapter04/Instrumenting/Instrumenting.csproj
@@ -8,10 +8,10 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.Configuration" Version="7.0.0-preview.1.22076.8" />
-    <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="7.0.0-preview.1.22076.8" />
-    <PackageReference Include="Microsoft.Extensions.Configuration.FileExtensions" Version="7.0.0-preview.1.22076.8" />
-    <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="7.0.0-preview.1.22076.8" />
+    <PackageReference Include="Microsoft.Extensions.Configuration" Version="7.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="7.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.FileExtensions" Version="7.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="7.0.0" />
   </ItemGroup>
 
   <ItemGroup>