diff --git a/DESCRIPTION b/DESCRIPTION
index 63795ed..c3049bb 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,6 +1,6 @@
 Package: primarycensoreddist
 Title: Primary Event Censored Distributions in R and Stan
-Version: 0.4.0
+Version: 0.4.0.1000
 Authors@R:
   c(person(given = "Sam",
            family = "Abbott",
diff --git a/NEWS.md b/NEWS.md
index e2f742a..fa22f4d 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,7 @@
+# primarycensoreddist 0.4.0.1000
+
+This is the current development version.
+
 # primarycensoreddist 0.4.0
 
 In this release, we have added a new package `stan` model for fitting distributions using the `cmdstanr` package. We have also added a new function `fitdistdoublecens()` to allow for fitting of double censored and truncated data using the `fitdistrplus` package. As well as these functionality improvements this release focuses on improving the stability of the `stan` model and improving the speed of the `primary_censored_ode` function.