diff --git a/CITATION.cff b/CITATION.cff
index 9056761..c69f218 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -2,9 +2,9 @@ cff-version: 1.2.0
 message: Please use the following metadata when citing this project in your work.
 title: macOS
 abstract: Shell scripts for automated macOS machine setup.
-version: 20.3.0
+version: 21.0.0
 license: Hippocratic-2.1
-date-released: 2025-07-15
+date-released: 2025-09-19
 authors:
   - family-names: Kuhlmann
     given-names: Brooke
diff --git a/README.adoc b/README.adoc
index 15c7ae1..fb126aa 100644
--- a/README.adoc
+++ b/README.adoc
@@ -53,7 +53,7 @@ To install, run:
 ----
 git clone https://github.com/bkuhlmann/mac_os.git
 cd mac_os
-git checkout 20.3.0
+git checkout 21.0.0
 ----
 
 == Usage