diff --git a/dotnet-etcd/dotnet-etcd.csproj b/dotnet-etcd/dotnet-etcd.csproj
index fbea8fd..8c21bce 100644
--- a/dotnet-etcd/dotnet-etcd.csproj
+++ b/dotnet-etcd/dotnet-etcd.csproj
@@ -46,7 +46,7 @@ Advanced uses take advantage of the consistency guarantees to implement database
 
   <ItemGroup>
     <PackageReference Include="DnsClient" Version="1.3.2" />
-    <PackageReference Include="Google.Protobuf" Version="3.12.4" />
+    <PackageReference Include="Google.Protobuf" Version="3.15.6" />
     <PackageReference Include="Grpc.Core" Version="2.31.0" />
     <PackageReference Include="Grpc.Tools" Version="2.31.0">
       <PrivateAssets>all</PrivateAssets>