diff --git a/HISTORY.md b/HISTORY.md
index 2a3560be4..6422158aa 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,3 +1,7 @@
+# Release 0.40.0
+
+[...]
+
 # Release 0.39.1
 
 No changes from 0.39.0 — this patch is released just to re-trigger a Documenter.jl run.
diff --git a/Project.toml b/Project.toml
index d675cd889..9edbc9f34 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "Turing"
 uuid = "fce5fe82-541a-59a6-adf8-730c64b5f9a0"
-version = "0.39.1"
+version = "0.40.0"
 
 [deps]
 ADTypes = "47edcb42-4c32-4615-8424-f2b9edc5f35b"