diff --git a/generators/app/templates/kotlin-vertx/pom.xml b/generators/app/templates/kotlin-vertx/pom.xml
index 1d4673f..995266b 100644
--- a/generators/app/templates/kotlin-vertx/pom.xml
+++ b/generators/app/templates/kotlin-vertx/pom.xml
@@ -29,7 +29,7 @@
     <jgiven.version>0.16.1</jgiven.version>
     <junit4.version>4.12</junit4.version>
     <slf4j.version>1.7.25</slf4j.version>
-    <vertx.version>3.5.4</vertx.version>
+    <vertx.version>3.9.4</vertx.version>
     <vavr.version>0.9.2</vavr.version>
   </properties>