diff --git a/router-protobuf/build.gradle.kts b/router-protobuf/build.gradle.kts
index 2995769..340676c 100644
--- a/router-protobuf/build.gradle.kts
+++ b/router-protobuf/build.gradle.kts
@@ -14,8 +14,8 @@ dependencies {
     implementation(kotlin("reflect"))
 
     implementation("org.slf4j:slf4j-api:2.0.12")
-    api("com.google.protobuf:protobuf-java:3.25.3")
-    api("com.google.protobuf:protobuf-java-util:3.25.3")
+    api("com.google.protobuf:protobuf-java:4.26.1")
+    api("com.google.protobuf:protobuf-java-util:4.26.1")
     implementation("com.google.guava:guava:33.1.0-jre")
     api(project(":router"))