diff --git a/Yt.Extensions.Configuration.Test/packages.config b/Yt.Extensions.Configuration.Test/packages.config
index 9e5013e..1f2ac97 100644
--- a/Yt.Extensions.Configuration.Test/packages.config
+++ b/Yt.Extensions.Configuration.Test/packages.config
@@ -3,7 +3,7 @@
   <package id="Consul" version="0.7.2.6" targetFramework="net472" />
   <package id="DnsClient" version="1.3.1" targetFramework="net472" />
   <package id="dotnet-etcd" version="3.2.0" targetFramework="net472" />
-  <package id="Google.Protobuf" version="3.11.4" targetFramework="net472" />
+  <package id="Google.Protobuf" version="3.15.0" targetFramework="net472" />
   <package id="Grpc.Core" version="2.28.1" targetFramework="net472" />
   <package id="Grpc.Core.Api" version="2.28.1" targetFramework="net472" />
   <package id="Microsoft.Bcl.AsyncInterfaces" version="1.1.0" targetFramework="net472" />