diff --git a/src/qlik-sseapi.csproj b/src/qlik-sseapi.csproj
index 28db0f1..ec7432e 100644
--- a/src/qlik-sseapi.csproj
+++ b/src/qlik-sseapi.csproj
@@ -41,7 +41,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="All" />
     <PackageReference Include="GitVersionTask" Version="5.5.1" PrivateAssets="all" />
-    <PackageReference Include="Google.Protobuf" Version="3.21.6" />
+    <PackageReference Include="Google.Protobuf" Version="3.21.9" />
     <PackageReference Include="Grpc.Core" Version="2.41.1" />
     <PackageReference Include="Grpc.Tools" Version="2.49.1" PrivateAssets="all" />
   </ItemGroup>