diff --git a/pom.xml b/pom.xml
index cdb46a7..cb596e7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -10,7 +10,7 @@
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <!-- Be careful modifying these due to joint netty dependencies -->
-    <vertx.version>3.5.3</vertx.version>
+    <vertx.version>3.9.4</vertx.version>
     <spark.version>2.3.0</spark.version>
     <doc.skip>true</doc.skip>
   </properties>