diff --git a/planetiler-core/pom.xml b/planetiler-core/pom.xml
index 94e8e109..a1ef51f2 100644
--- a/planetiler-core/pom.xml
+++ b/planetiler-core/pom.xml
@@ -19,7 +19,7 @@
     <geotools.version>27.2</geotools.version>
     <log4j.version>2.19.0</log4j.version>
     <prometheus.version>0.16.0</prometheus.version>
-    <protobuf.version>3.21.8</protobuf.version>
+    <protobuf.version>3.21.9</protobuf.version>
   </properties>
 
   <dependencies>