diff --git a/pom.xml b/pom.xml
index 29d4db9a4..8ba37fc11 100644
--- a/pom.xml
+++ b/pom.xml
@@ -566,7 +566,7 @@
     <project.jsr305.version>3.0.2</project.jsr305.version>
     <project.gson.version>2.10</project.gson.version>
     <project.jackson-core2.version>2.13.4</project.jackson-core2.version>
-    <project.protobuf-java.version>3.21.8</project.protobuf-java.version>
+    <project.protobuf-java.version>3.21.9</project.protobuf-java.version>
     <project.guava.version>30.1.1-android</project.guava.version>
     <project.xpp3.version>1.1.4c</project.xpp3.version>
     <project.httpclient.version>4.5.13</project.httpclient.version>