diff --git a/DESCRIPTION b/DESCRIPTION
index 0701eeba1..7187de00c 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,6 +1,6 @@
 Package: epiparameter
 Title: Classes and Helper Functions for Working with Epidemiological Parameters
-Version: 0.4.1
+Version: 0.4.1.9000
 Authors@R: c(
     person("Joshua W.", "Lambert", , "joshua.lambert@lshtm.ac.uk", role = c("aut", "cre", "cph"),
            comment = c(ORCID = "0000-0001-5218-3046")),
diff --git a/NEWS.md b/NEWS.md
index fa7f83b6e..309f29864 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,5 @@
+# epiparameter (development version)
+
 # epiparameter 0.4.1
 
 A patch release resolving issues flagged by CRAN checks.