diff --git a/csharp/src/lesson04/solution/Lesson04.Solution.Server/Lesson04.Solution.Server.csproj b/csharp/src/lesson04/solution/Lesson04.Solution.Server/Lesson04.Solution.Server.csproj
index 8dd5849..d305039 100644
--- a/csharp/src/lesson04/solution/Lesson04.Solution.Server/Lesson04.Solution.Server.csproj
+++ b/csharp/src/lesson04/solution/Lesson04.Solution.Server/Lesson04.Solution.Server.csproj
@@ -7,7 +7,7 @@
 
   <ItemGroup>
     <PackageReference Include="Jaeger" Version="0.0.10" />
-    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.8" />
+    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.9" />
     <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="2.0.4" />
     <PackageReference Include="OpenTracing.Contrib.NetCore" Version="0.4.0" />
   </ItemGroup>