diff --git a/DESCRIPTION b/DESCRIPTION
index b5290dc..170eeaa 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: composableIDModelR
 Type: Package
 Title: Composable Infectious Disease Models via 'ComposableTuringIDModels.jl'
-Version: 0.2.0.9000
+Version: 0.3.0
 Authors@R: person("Sebastian", "Funk", email = "sebastian.funk@lshtm.ac.uk", role = c("aut", "cre", "cph"))
 Description: Provides an R interface to 'ComposableTuringIDModels.jl', the
     composable probabilistic infectious disease modelling package of the
diff --git a/NEWS.md b/NEWS.md
index c892ea1..5b15268 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,4 +1,4 @@
-# composableIDModelR (development version)
+# composableIDModelR 0.3.0
 
 ## Breaking changes
 
@@ -30,6 +30,9 @@
   [juliabridge](https://github.com/epiforecasts/juliabridge), which juliaready
   was renamed to. An install from GitHub picks it up through `Remotes`; an
   existing checkout needs the dependency reinstalled.
+* composableIDModelR needs R 4.1.0 or later, up from 4.0.0, and Julia 1.12 or
+  later, up from 1.9. `cidm_setup_julia()` installs a matching Julia through
+  juliaup; a Julia installed by hand needs upgrading separately.
 * `julia_spec()`, `julia()` and `as_julia()` come from juliabridge, which
   composableIDModelR re-exports. The code that renders a component to Julia
   source moved there so that other packages can build Julia calls the same