diff --git a/src/JobManagerFramework/packages.config b/src/JobManagerFramework/packages.config
index ff005f315..1243b2d10 100644
--- a/src/JobManagerFramework/packages.config
+++ b/src/JobManagerFramework/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.11.4" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.15.0" targetFramework="net45" />
   <package id="Grpc" version="2.27.0" targetFramework="net45" />
   <package id="Grpc.Core" version="2.27.0" targetFramework="net45" />
   <package id="Grpc.Core.Api" version="2.27.0" targetFramework="net45" />