diff --git a/pom.xml b/pom.xml
index e78ec63..8421430 100644
--- a/pom.xml
+++ b/pom.xml
@@ -102,7 +102,7 @@
         </plugins>
     </build>
     <properties>
-        <vertxVersion>3.9.1</vertxVersion>
+        <vertxVersion>3.9.4</vertxVersion>
     </properties>
     <dependencies>
         <dependency>