diff --git a/protobuf-java-converter/build.gradle.kts b/protobuf-java-converter/build.gradle.kts
index 0b69258ad1..8e3e19aba9 100644
--- a/protobuf-java-converter/build.gradle.kts
+++ b/protobuf-java-converter/build.gradle.kts
@@ -23,7 +23,7 @@ dependencies {
   val kotlinSerializeVersion: String by project
 
   implementation(projects.kompendiumJsonSchema)
-  implementation("com.google.protobuf:protobuf-java:3.25.5")
+  implementation("com.google.protobuf:protobuf-java:4.28.3")
   implementation("org.jetbrains.kotlin:kotlin-reflect:$kotlinVersion")
   implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:$kotlinSerializeVersion")