diff --git a/openl3/version.py b/openl3/version.py
index 6dbdc0f..ef95ff4 100644
--- a/openl3/version.py
+++ b/openl3/version.py
@@ -1,2 +1,2 @@
-short_version = '0.3'
-version = '0.4.0'
+short_version = '0.4'
+version = '0.4.0rc0'