diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index a205fe27..e0b45c2d 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -10,7 +10,7 @@ maven-publish = "0.30.0"
 # - conformance/buf.gen.yaml
 # - src/test/resources/proto/buf.gen.imports.yaml
 # - src/test/resources/proto/buf.gen.noimports.yaml
-protobuf = "4.28.2"
+protobuf = "4.28.3"
 
 [libraries]
 assertj = { module = "org.assertj:assertj-core", version.ref = "assertj" }