diff --git a/docs/source/conf.py b/docs/source/conf.py
index 7c0d9252e..1b98eb3be 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -94,9 +94,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = "3.21.dev0"
+version = "3.21.0rc0"
 # The full version, including alpha/beta/rc tags.
-release = "3.21.dev0"
+release = "3.21.0rc0"
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/setup.py b/setup.py
index edbcf34cb..bc5d14701 100644
--- a/setup.py
+++ b/setup.py
@@ -22,7 +22,7 @@
 # default_version is the version if "git describe --tags" falls through
 # Additional package info is set in foqus_lib/version/version.template.
 # The version module, just makes it a bit easier for FOQUS to pull package info
-default_version = "3.21.dev0"
+default_version = "3.21.0rc0"
 
 try:
     version = (