diff --git a/pom.xml b/pom.xml
index 248f1a97..412b3595 100644
--- a/pom.xml
+++ b/pom.xml
@@ -9,7 +9,7 @@
   </parent>
 
   <artifactId>vertx-mqtt</artifactId>
-  <version>3.6.0</version>
+  <version>4.0.0-SNAPSHOT</version>
 
   <developers>
     <developer>
@@ -21,7 +21,7 @@
   </developers>
 
   <properties>
-    <stack.version>3.6.0</stack.version>
+    <stack.version>4.0.0-SNAPSHOT</stack.version>
     <junit.version>4.12</junit.version>
     <paho.version>1.1.0</paho.version>
     <fabric8-docker-plugin.version>0.21.0</fabric8-docker-plugin.version>