diff --git a/conda/meta.yaml b/conda/meta.yaml
index 88e91c90..4e8fd681 100644
--- a/conda/meta.yaml
+++ b/conda/meta.yaml
@@ -1,5 +1,5 @@
 {% set name = "mache" %}
-{% set version = "1.20.0" %}
+{% set version = "1.21.0rc1" %}
 
 package:
   name: {{ name|lower }}
diff --git a/mache/version.py b/mache/version.py
index 99b63e06..05887a37 100644
--- a/mache/version.py
+++ b/mache/version.py
@@ -1,2 +1,2 @@
-__version_info__ = (1, 20, 0)
+__version_info__ = (1, 21, 0)
 __version__ = '.'.join(str(vi) for vi in __version_info__)
diff --git a/setup.cfg b/setup.cfg
index e718cead..03474364 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = mache
-version = 1.20.0
+version = 1.21.0rc1
 author = Xylar Asay-Davis
 author_email = xylar@lanl.gov
 description = A package for providing configuration data relate to E3SM supported machines