diff --git a/pyproject.toml b/pyproject.toml
index b9eca28..cede4d8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "sdss-hal"
-version = "1.2.0"
+version = "1.2.1a0"
 description = "High-level observing tool for SDSS-V (replaces SOP)"
 authors = ["José Sánchez-Gallego <gallegoj@uw.edu>"]
 license = "BSD-3-Clause"