diff --git a/cmd/suggestion/skopt/v1beta1/requirements.txt b/cmd/suggestion/skopt/v1beta1/requirements.txt
index 3734706b97d..341c6c0bdac 100644
--- a/cmd/suggestion/skopt/v1beta1/requirements.txt
+++ b/cmd/suggestion/skopt/v1beta1/requirements.txt
@@ -1,4 +1,4 @@
-grpcio==1.23.0
+grpcio==1.53.0
 cloudpickle==0.5.6
 numpy>=1.13.3
 scikit-learn==0.22.0