diff --git a/chapter04/sample.microservice.reservation-grpc/sample.microservice.reservation-grpc.csproj b/chapter04/sample.microservice.reservation-grpc/sample.microservice.reservation-grpc.csproj
index 46ddc8a..3c82004 100644
--- a/chapter04/sample.microservice.reservation-grpc/sample.microservice.reservation-grpc.csproj
+++ b/chapter04/sample.microservice.reservation-grpc/sample.microservice.reservation-grpc.csproj
@@ -10,7 +10,7 @@
   <ItemGroup>
     <PackageReference Include="Grpc.AspNetCore" Version="2.42.0" />
     <PackageReference Include="Google.Protobuf" Version="3.19.4" />
-    <PackageReference Include="Grpc.Net.Client" Version="2.42.0" />
+    <PackageReference Include="Grpc.Net.Client" Version="2.52.0" />
     <PackageReference Include="Grpc.Tools" Version="2.43.0" PrivateAssets="All" />
     <PackageReference Include="Google.Api.CommonProtos" Version="2.5.0" />
   </ItemGroup>