diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 6b8290c..34b036b 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -3,7 +3,7 @@ indra = "3.1.3"
 wire = "4.9.9"
 
 [libraries]
-protobuf = "com.google.protobuf:protobuf-java:4.26.1"
+protobuf = "com.google.protobuf:protobuf-java:4.28.2"
 wireGrpcClient = { module = "com.squareup.wire:wire-grpc-client", version.ref = "wire" }
 
 buildKotlin = "org.jetbrains.kotlin:kotlin-gradle-plugin:1.9.23"