diff --git a/dotnet_desktop/ChatWindowsClient/packages.config b/dotnet_desktop/ChatWindowsClient/packages.config
index addcae0..c815a32 100644
--- a/dotnet_desktop/ChatWindowsClient/packages.config
+++ b/dotnet_desktop/ChatWindowsClient/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.0.0" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.15.0" targetFramework="net45" />
   <package id="Grpc" version="1.0.1" targetFramework="net45" />
   <package id="Grpc.Core" version="1.0.1" targetFramework="net45" />
   <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />