diff --git a/src/OrderBooks.Client/OrderBooks.Client.csproj b/src/OrderBooks.Client/OrderBooks.Client.csproj
index e5f6f96..7ef1b26 100644
--- a/src/OrderBooks.Client/OrderBooks.Client.csproj
+++ b/src/OrderBooks.Client/OrderBooks.Client.csproj
@@ -22,7 +22,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Autofac" Version="5.1.2" />
-    <PackageReference Include="Google.Protobuf" Version="3.11.4" />
+    <PackageReference Include="Google.Protobuf" Version="3.15.0" />
     <PackageReference Include="Grpc.Net.Client" Version="2.27.0" />
     <PackageReference Include="Grpc.Tools" Version="2.27.0">
       <PrivateAssets>all</PrivateAssets>