diff --git a/Contracts/Contracts.csproj b/Contracts/Contracts.csproj
index c437c60..2787575 100644
--- a/Contracts/Contracts.csproj
+++ b/Contracts/Contracts.csproj
@@ -11,7 +11,7 @@
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     <PackageReference Include="System.Text.Json" Version="4.7.0" />
-    <PackageReference Include="Google.Protobuf" Version="3.6.1" />
+    <PackageReference Include="Google.Protobuf" Version="3.15.0" />
     <PackageReference Include="Grpc" Version="1.17.0" />
     <PackageReference Include="Grpc.Tools" Version="1.17.0" PrivateAssets="All" />
   </ItemGroup>