diff --git a/build.gradle b/build.gradle
index 559394b..1bad66e 100644
--- a/build.gradle
+++ b/build.gradle
@@ -11,7 +11,7 @@ allprojects {
 
 ext {
     grpcVersion = '1.66.0'
-    protobufVersion = '3.25.4'
+    protobufVersion = '4.28.1'
 }
 
 nexusPublishing {