diff --git a/src/Extensions.Grok/Extensions.Grok.csproj b/src/Extensions.Grok/Extensions.Grok.csproj
index 9cbaf07..624c0b1 100644
--- a/src/Extensions.Grok/Extensions.Grok.csproj
+++ b/src/Extensions.Grok/Extensions.Grok.csproj
@@ -14,7 +14,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.33.2" />
+    <PackageReference Include="Google.Protobuf" Version="3.33.4" />
     <PackageReference Include="GrokClient" Version="1.1.0" />
     <PackageReference Include="Grpc.Net.Client" Version="2.76.0" />
     <PackageReference Include="Grpc.Tools" Version="2.76.0" PrivateAssets="all" />