diff --git a/csharp/src/lesson04/solution/Lesson04.Solution.Client/Lesson04.Solution.Client.csproj b/csharp/src/lesson04/solution/Lesson04.Solution.Client/Lesson04.Solution.Client.csproj
index da16392..d2eae20 100644
--- a/csharp/src/lesson04/solution/Lesson04.Solution.Client/Lesson04.Solution.Client.csproj
+++ b/csharp/src/lesson04/solution/Lesson04.Solution.Client/Lesson04.Solution.Client.csproj
@@ -7,7 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.8" />
+    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.9" />
   </ItemGroup>
 
   <ItemGroup>