diff --git a/packages.config b/packages.config
index 955f05c..60a07ac 100644
--- a/packages.config
+++ b/packages.config
@@ -2,7 +2,7 @@
 <packages>
   <package id="BouncyCastle" version="1.8.5" targetFramework="net472" />
   <package id="EntityFramework" version="6.3.0" 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.AspNet.Razor" version="3.2.6" targetFramework="net472" />
   <package id="Microsoft.AspNet.WebPages" version="3.2.6" targetFramework="net472" />
   <package id="Microsoft.AspNet.WebPages.Data" version="3.2.6" targetFramework="net472" />