diff --git a/pyproject.toml b/pyproject.toml
index 52c9704..12b0b22 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "poetry.core.masonry.api"
 
 [tool.poetry]
 name = "python-cmr"
-version = "0.11.0"
+version = "0.12.0-a0"
 description = "Python wrapper to the NASA Common Metadata Repository (CMR) API."
 authors = ["python_cmr <nasa/python_cmr@github.com>"]
 license = "MIT"