diff --git a/Hotel/gRPC/HotelCore/src/HotelCore.WcfProxy/packages.config b/Hotel/gRPC/HotelCore/src/HotelCore.WcfProxy/packages.config
index 2e12603..208a341 100644
--- a/Hotel/gRPC/HotelCore/src/HotelCore.WcfProxy/packages.config
+++ b/Hotel/gRPC/HotelCore/src/HotelCore.WcfProxy/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.11.4" targetFramework="net472" />
+  <package id="Google.Protobuf" version="3.15.0" targetFramework="net472" />
   <package id="Grpc" version="2.28.1" targetFramework="net472" />
   <package id="Grpc.Core" version="2.28.1" targetFramework="net472" />
   <package id="Grpc.Core.Api" version="2.28.1" targetFramework="net472" />