diff --git a/DataAccessLibrary/packages.config b/DataAccessLibrary/packages.config
index 38da34e..80fbe7b 100644
--- a/DataAccessLibrary/packages.config
+++ b/DataAccessLibrary/packages.config
@@ -5,7 +5,7 @@
   <package id="EntityFramework" version="6.2.0" targetFramework="net472" />
   <package id="EntityFramework.SqlServerCompact" version="6.2.0" targetFramework="net472" />
   <package id="EntityFramework.zh-Hans" version="6.2.0" targetFramework="net472" />
-  <package id="Google.Protobuf" version="3.6.1" targetFramework="net472" />
+  <package id="Google.Protobuf" version="3.15.0" targetFramework="net472" />
   <package id="Microsoft.SqlServer.Compact" version="4.0.8876.1" targetFramework="net472" />
   <package id="MySql.Data" version="8.0.17" targetFramework="net472" />
   <package id="MySql.Data.Entity" version="6.10.8" targetFramework="net472" />