diff --git a/ModelLibrary/ModelLibrary.csproj b/ModelLibrary/ModelLibrary.csproj
index 6f5673c..8ba4b8c 100644
--- a/ModelLibrary/ModelLibrary.csproj
+++ b/ModelLibrary/ModelLibrary.csproj
@@ -5,7 +5,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.7.0" />
+    <PackageReference Include="Google.Protobuf" Version="3.15.0" />
     <PackageReference Include="Grpc" Version="1.19.0" />
     <PackageReference Include="Grpc.Tools" Version="1.19.0">
       <PrivateAssets>all</PrivateAssets>