diff --git a/samples/snippets/requirements.txt b/samples/snippets/requirements.txt
index cc78ad4c..3a3427b5 100644
--- a/samples/snippets/requirements.txt
+++ b/samples/snippets/requirements.txt
@@ -1,4 +1,4 @@
-grpcio==1.27.2
+grpcio==1.28.1
 google-auth==1.11.2
 google-auth-httplib2==0.0.3
 google-cloud==0.34.0