diff --git a/PhoenixSharp.UnitTests/packages.config b/PhoenixSharp.UnitTests/packages.config
index 7b74276..26f05f7 100644
--- a/PhoenixSharp.UnitTests/packages.config
+++ b/PhoenixSharp.UnitTests/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.0.0" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.15.0" targetFramework="net45" />
   <package id="NUnit" version="2.6.4" targetFramework="net45" />
 </packages>
\ No newline at end of file