diff --git a/src/INetMock.Client/INetMock.Client.csproj b/src/INetMock.Client/INetMock.Client.csproj
index bfe120a..1051980 100644
--- a/src/INetMock.Client/INetMock.Client.csproj
+++ b/src/INetMock.Client/INetMock.Client.csproj
@@ -9,7 +9,7 @@
         <Using Include="Inetmock.Rpc.V1" />
     </ItemGroup>
     <ItemGroup>
-        <PackageReference Include="Google.Protobuf" Version="3.20.1" />
+        <PackageReference Include="Google.Protobuf" Version="3.21.1" />
         <PackageReference Include="Grpc.Net.Client" Version="2.46.0" />
         <PackageReference Include="Grpc.Net.ClientFactory" Version="2.46.0" />
         <PackageReference Include="Grpc.Tools" Version="2.46.3">