diff --git a/OpGenerator/packages.config b/OpGenerator/packages.config
index 2b99280a..06f138e0 100644
--- a/OpGenerator/packages.config
+++ b/OpGenerator/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.4.1" targetFramework="net471" />
+  <package id="Google.Protobuf" version="3.15.0" targetFramework="net471" />
   <package id="Google.Protobuf.Tools" version="3.4.0" targetFramework="net471" />
   <package id="protobuf-net" version="2.3.2" targetFramework="net471" />
 </packages>
\ No newline at end of file