diff --git a/src/CacheTower.Serializers.Protobuf/CacheTower.Serializers.Protobuf.csproj b/src/CacheTower.Serializers.Protobuf/CacheTower.Serializers.Protobuf.csproj
index f1ece1d7..d646ae5a 100644
--- a/src/CacheTower.Serializers.Protobuf/CacheTower.Serializers.Protobuf.csproj
+++ b/src/CacheTower.Serializers.Protobuf/CacheTower.Serializers.Protobuf.csproj
@@ -9,7 +9,7 @@
 	</PropertyGroup>
 
 	<ItemGroup>
-		<PackageReference Include="protobuf-net" Version="3.2.30" />
+		<PackageReference Include="protobuf-net" Version="3.4.40" />
 	</ItemGroup>
 
 	<ItemGroup>