diff --git a/DESCRIPTION b/DESCRIPTION
index 928779c..df043bf 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Type: Package
 Package: mlr3mbo
 Title: Flexible Bayesian Optimization
-Version: 0.2.3
+Version: 0.2.3.9000
 Authors@R: c(
     person("Lennart", "Schneider", , "lennart.sch@web.de", role = c("cre", "aut"),
            comment = c(ORCID = "0000-0003-4152-5308")),
diff --git a/NEWS.md b/NEWS.md
index 7a23477..5776668 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,5 @@
+# mlr3mbo (development version)
+
 # mlr3mbo 0.2.3
 
 * compatibility: Work with new bbotk and mlr3tuning version 1.0.0.