diff --git a/packages.config b/packages.config
index 61c321a..84b80a1 100644
--- a/packages.config
+++ b/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.6.1" targetFramework="net452" />
+  <package id="Google.Protobuf" version="3.15.0" targetFramework="net452" />
   <package id="Newtonsoft.Json" version="12.0.1" targetFramework="net452" />
 </packages>
\ No newline at end of file