diff --git a/ScipDotnet/ScipDotnet.csproj b/ScipDotnet/ScipDotnet.csproj
index 3d7b1e3..15b4e79 100644
--- a/ScipDotnet/ScipDotnet.csproj
+++ b/ScipDotnet/ScipDotnet.csproj
@@ -17,7 +17,7 @@
   <ItemGroup>
     <None Include="../LICENSE" Pack="true" PackagePath="" />
     <None Include="../readme.md" Pack="true" PackagePath="" />
-    <PackageReference Include="Google.Protobuf" Version="3.30.0" />
+    <PackageReference Include="Google.Protobuf" Version="3.33.1" />
     <PackageReference Include="Microsoft.Build.Locator" Version="1.7.8" />
     <PackageReference Include="Microsoft.CodeAnalysis" Version="4.4.0" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Features" Version="4.4.0" />