diff --git a/pyproject.toml b/pyproject.toml
index c8afbd0..d70032c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "sdsstools"
-version = "1.9.0"
+version = "1.9.1a0"
 description = "Small tools for SDSS products"
 authors = [
     { name = "José Sánchez-Gallego", email = "gallegoj@uw.edu" }
diff --git a/uv.lock b/uv.lock
index f67ec1f..d8b1240 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1418,7 +1418,7 @@ wheels = [
 
 [[package]]
 name = "sdsstools"
-version = "1.9.0"
+version = "1.9.1a0"
 source = { editable = "." }
 dependencies = [
     { name = "daemonocle" },