diff --git a/pyproject.toml b/pyproject.toml
index e8a31953..383f397e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "janus-core"
-version = "0.6.3b2"
+version = "0.6.4"
 description = "Tools for machine learnt interatomic potentials"
 authors = [
     "Elliott Kasoar",