diff --git a/pom.xml b/pom.xml
index 4084b4d..f3c5655 100644
--- a/pom.xml
+++ b/pom.xml
@@ -17,7 +17,7 @@
 	<properties>
 		<!-- Software versions -->
 		<java.version>1.8</java.version>
-		<vertx.version>3.5.4</vertx.version>
+		<vertx.version>3.9.4</vertx.version>
 		<joda.version>2.10</joda.version>
 		<mustache.version>0.9.5</mustache.version>
 		<junit.version>4.12</junit.version>