diff --git a/coredata.py b/coredata.py
index aa846ffe6..123a47745 100644
--- a/coredata.py
+++ b/coredata.py
@@ -16,7 +16,7 @@
 
 import pickle
 
-version = '0.3.0-research'
+version = '0.4.0'
 
 # This class contains all data that must persist over multiple
 # invocations of Meson. It is roughly the same thing as