diff --git a/py/desispec/_version.py b/py/desispec/_version.py
index cce19d859..1a37fe2f2 100644
--- a/py/desispec/_version.py
+++ b/py/desispec/_version.py
@@ -1 +1 @@
-__version__ = '0.66.0'
+__version__ = '0.66.0.dev8755'