diff --git a/Xu.Common/packages.config b/Xu.Common/packages.config
index c7f0f3d..71230f6 100644
--- a/Xu.Common/packages.config
+++ b/Xu.Common/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.5.1" targetFramework="net461" />
+  <package id="Google.Protobuf" version="3.15.0" targetFramework="net461" />
   <package id="MySql.Data" version="8.0.13" targetFramework="net461" />
   <package id="Newtonsoft.Json" version="12.0.3" targetFramework="net461" />
   <package id="Oracle.ManagedDataAccess" version="18.6.0" targetFramework="net461" />