diff --git a/build.gradle b/build.gradle
index 0b0db4a..3eabafb 100644
--- a/build.gradle
+++ b/build.gradle
@@ -24,7 +24,7 @@ sourceCompatibility = 1.8
 targetCompatibility = 1.8
 
 def grpcVersion = '1.68.0'
-def protobufVersion = '4.28.2'
+def protobufVersion = '4.28.3'
 def protocVersion = protobufVersion
 
 dependencies {