diff --git a/first-party-dependencies/pom.xml b/first-party-dependencies/pom.xml
index a65beee0..18f01592 100644
--- a/first-party-dependencies/pom.xml
+++ b/first-party-dependencies/pom.xml
@@ -60,7 +60,7 @@
     <grpc-gcp.version>1.3.1</grpc-gcp.version>
     <gson.version>2.10</gson.version>
     <guava.version>31.1-jre</guava.version>
-    <protobuf.version>3.21.8</protobuf.version>
+    <protobuf.version>3.21.9</protobuf.version>
     <google.api-common.version>2.2.1</google.api-common.version>
     <google.common-protos.version>2.9.6</google.common-protos.version>
     <google.core.version>2.8.24</google.core.version>