diff --git a/LibraryManagmentConnectSDK/LibraryManagmentConnectSDK.csproj b/LibraryManagmentConnectSDK/LibraryManagmentConnectSDK.csproj
index a2b0800..df5893f 100644
--- a/LibraryManagmentConnectSDK/LibraryManagmentConnectSDK.csproj
+++ b/LibraryManagmentConnectSDK/LibraryManagmentConnectSDK.csproj
@@ -5,7 +5,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.9.0" />
+    <PackageReference Include="Google.Protobuf" Version="3.15.0" />
     <PackageReference Include="Grpc.Core" Version="1.22.0" />
     <PackageReference Include="Grpc.Tools" Version="1.22.0">
       <PrivateAssets>all</PrivateAssets>