diff --git a/pyproject.toml b/pyproject.toml
index e45ae30..f8e2741 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,6 @@
 [project]
 name = "cubed-xarray"
+version = "0.0.1"
 authors = [
     {name = "Tom Nicholas", email = "tomnicholas1@googlemail.com"}
 ]