diff --git a/pyproject.toml b/pyproject.toml
index 55c670a..cd941cb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "datasette-llm-usage"
-version = "0.1"
+version = "0.1a0"
 description = "Track usage of LLM tokens in a SQLite table"
 readme = "README.md"
 authors = [{name = "Simon Willison"}]