diff --git a/requirements/base.txt b/requirements/base.txt
index c9288b0f..1d3ef45e 100644
--- a/requirements/base.txt
+++ b/requirements/base.txt
@@ -6,7 +6,7 @@
 #    pip-compile-multi
 #
 grpcio==1.28.1            # via -r base.in
-protobuf==3.6.1           # via -r base.in
+protobuf==3.15.8           # via -r base.in
 six==1.14.0               # via grpcio, protobuf
 
 # The following packages are considered to be unsafe in a requirements file: