diff --git a/Utilities/ServiceLoaderBucks/ServiceLoader/packages.config b/Utilities/ServiceLoaderBucks/ServiceLoader/packages.config
index 6dc2450a..8e0925ce 100644
--- a/Utilities/ServiceLoaderBucks/ServiceLoader/packages.config
+++ b/Utilities/ServiceLoaderBucks/ServiceLoader/packages.config
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="BouncyCastle" version="1.8.3.1" targetFramework="net461" />
-  <package id="Google.Protobuf" version="3.6.1" targetFramework="net461" />
+  <package id="Google.Protobuf" version="3.15.0" targetFramework="net461" />
   <package id="MySql.Data" version="8.0.17" targetFramework="net461" />
   <package id="Newtonsoft.Json" version="12.0.2" targetFramework="net461" />
   <package id="NLog" version="4.6.7" targetFramework="net461" />