diff --git a/DESCRIPTION b/DESCRIPTION
index 46c5c8e..95ffb4f 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,6 +1,6 @@
 Package: mousetrap
 Type: Package
-Version: 3.2.3
+Version: 3.2.3.9000
 Title: Process and Analyze Mouse-Tracking Data
 Description: Mouse-tracking, the analysis of mouse movements in computerized
     experiments, is a method that is becoming increasingly popular in the
diff --git a/R/startupmessage.R b/R/startupmessage.R
index ed11763..faa9d57 100644
--- a/R/startupmessage.R
+++ b/R/startupmessage.R
@@ -1,5 +1,5 @@
 .onAttach <- function(libname, pkgname) {
-  packageStartupMessage("Welcome to mousetrap 3.2.3!")
+  packageStartupMessage("Welcome to mousetrap 3.2.3.9000!")
   packageStartupMessage("Summary of recent changes: http://pascalkieslich.github.io/mousetrap/news/")
   packageStartupMessage("Forum for questions: https://forum.cogsci.nl/index.php?p=/categories/mousetrap")
 }