diff --git a/gradle.properties b/gradle.properties
index 2a1f855b94..6ee0a640fc 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -55,7 +55,7 @@ zipkinReporterVersion=2.16.3
 
 # gRPC
 protobufGradlePluginVersion=0.8.18
-protobufVersion=3.20.0
+protobufVersion=3.21.0
 protoGoogleCommonProtosVersion=2.8.1
 javaPoetVersion=1.13.0
 shadowPluginVersion=7.1.1