diff --git a/CodeGolf.Service/CodeGolf.Service.csproj b/CodeGolf.Service/CodeGolf.Service.csproj
index 8f5a14ec9..1915ac01e 100644
--- a/CodeGolf.Service/CodeGolf.Service.csproj
+++ b/CodeGolf.Service/CodeGolf.Service.csproj
@@ -9,7 +9,7 @@
 
   <ItemGroup>
     <PackageReference Include="Ensure.That" Version="9.2.0" />
-    <PackageReference Include="Google.Protobuf" Version="3.13.0" />
+    <PackageReference Include="Google.Protobuf" Version="3.15.3" />
     <PackageReference Include="Grpc.Net.Client" Version="2.32.0" />
     <PackageReference Include="Grpc.Tools" Version="2.32.0">
       <PrivateAssets>all</PrivateAssets>