diff --git a/Benchmark/Benchmark.csproj b/Benchmark/Benchmark.csproj
index 7f88058..a150b7c 100644
--- a/Benchmark/Benchmark.csproj
+++ b/Benchmark/Benchmark.csproj
@@ -21,7 +21,7 @@
     <PackageReference Include="MessagePack" Version="2.3.85" />
     <PackageReference Include="MessagePack.ImmutableCollection" Version="2.3.85" />
     <PackageReference Include="NetSerializer" Version="4.1.1" />
-    <PackageReference Include="protobuf-net" Version="2.4.6" />
+    <PackageReference Include="protobuf-net" Version="3.2.56" />
     <PackageReference Include="ZeroFormatter" Version="1.6.4" />
   </ItemGroup>