diff --git a/pom.xml b/pom.xml
index ad5798a91..03efba278 100644
--- a/pom.xml
+++ b/pom.xml
@@ -144,7 +144,7 @@
         <opentelemetry.version>1.63.0</opentelemetry.version>
         <!-- Shared google-cloud libs converged so the firebase (Firestore) and google-genai
              plugins can coexist on one classpath (see dependencyManagement note below). -->
-        <protobuf.version>4.33.2</protobuf.version>
+        <protobuf.version>4.35.1</protobuf.version>
         <google-auth.version>1.48.0</google-auth.version>
         <junit.version>6.1.1</junit.version>
         <mockito.version>5.23.0</mockito.version>