diff --git a/build.gradle b/build.gradle
index d4445d0..51d91c5 100644
--- a/build.gradle
+++ b/build.gradle
@@ -11,7 +11,7 @@ allprojects {
 
 ext {
     grpcVersion = '1.68.0'
-    protobufVersion = '3.25.5'
+    protobufVersion = '4.28.3'
 }
 
 nexusPublishing {