diff --git a/gnmi/requirements.txt b/gnmi/requirements.txt
index a692c0e..f71f8a6 100644
--- a/gnmi/requirements.txt
+++ b/gnmi/requirements.txt
@@ -1,5 +1,5 @@
 enum34==1.1.6
 grpcio==1.18.0
 grpcio-tools==1.15.0
-protobuf==3.6.1 --no-binary=protobuf
+protobuf==3.15.0 --no-binary=protobuf
 six==1.12.0