diff --git a/build.gradle b/build.gradle
index 79baca5f..3233ef33 100644
--- a/build.gradle
+++ b/build.gradle
@@ -45,7 +45,7 @@ javadoc.options.encoding = 'UTF-8'
 
 protobuf {
     protoc {
-        artifact = 'com.google.protobuf:protoc:3.21.5'
+        artifact = 'com.google.protobuf:protoc:3.21.6'
     }
     plugins {
         javalite {