diff --git a/packages.config b/packages.config
index 0e06299..4e71338 100644
--- a/packages.config
+++ b/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.5.1" targetFramework="net452" />
+  <package id="Google.Protobuf" version="3.15.0" targetFramework="net452" />
   <package id="MySql.Data" version="8.0.11" targetFramework="net452" />
   <package id="Scs" version="1.1.1" targetFramework="net452" />
   <package id="System.Threading.Tasks.Dataflow" version="4.9.0" targetFramework="net452" />