diff --git a/external/src/grpc b/external/src/grpc
index b40fe4f..9f5a2ee 160000
--- a/external/src/grpc
+++ b/external/src/grpc
@@ -1 +1 @@
-Subproject commit b40fe4ffc46d292c08374bc38f6580658593104c
+Subproject commit 9f5a2ee257cc3a29eb62ee20972c3a27c2864539