diff --git a/CHANGES.md b/CHANGES.md
index 4187a08..c96013c 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,23 @@
 # Changes log for the Ruby CFF Library
 
+## Version 0.9.0
+
+* Update to final released version of schema 1.2.0.
+* Add `description` field to `Identifier`.
+* Add `Model::read` to parse a CFF file from memory.
+* Add `Model::open`. Same as `read` but can take a block.
+* Override `File#to_yaml`.
+* Allow `File::write` to write File objects.
+* Add `save_as` parameter to `File#write`.
+* Add `Reference::from_cff`.
+* Update CITATION.cff file to reference CFF repo.
+* Fix `File` docs to be explicit about filenames.
+* Validate the filename of a CFF file.
+* Surface the `fail_fast` options on the `File` validatation methods.
+* Reduce json_schema dependency to ~0.20.0.
+* Fix APA-like formatter when a reference is missing a volume.
+* APA: don't emit journal data if there's no journal.
+
 ## Version 0.8.0
 
 * Add a comment field to the File class.
diff --git a/CITATION.cff b/CITATION.cff
index af721ae..a4aedae 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -1,4 +1,4 @@
-# This CITATION.cff file was created by ruby-cff (v 0.8.0).
+# This CITATION.cff file was created by ruby-cff (v 0.9.0).
 # Gem: https://rubygems.org/gems/cff
 # CFF: https://citation-file-format.github.io/
 
@@ -15,12 +15,15 @@ authors:
 keywords:
 - ruby
 - credit
-- citation
+- software citation
+- research software
+- software sustainability
 - metadata
-- cff
-version: 0.8.0
+- citation file format
+- CFF
+version: 0.9.0
 doi: 10.5281/zenodo.1184077
-date-released: 2021-08-08
+date-released: 2021-08-18
 license: Apache-2.0
 repository-artifact: https://rubygems.org/gems/cff
 repository-code: https://github.com/citation-file-format/ruby-cff
@@ -77,4 +80,4 @@ references:
   abstract: CITATION.cff files are plain text files with human- and machine-readable citation information for software. Code developers can include them in their repositories to let others know how to correctly cite their software. This is the specification for the Citation File Format.
   date-released: 2021-08-09
   license: CC-BY-4.0
-  version: 1.2.0
\ No newline at end of file
+  version: 1.2.0
diff --git a/README.md b/README.md
index 9cc6fa6..31de9ed 100644
--- a/README.md
+++ b/README.md
@@ -51,8 +51,8 @@ keywords:
 - ruby
 - credit
 - citation
-version: 0.8.0
-date-released: 2021-08-08
+version: 0.9.0
+date-released: 2021-08-18
 license: Apache-2.0
 repository-artifact: https://rubygems.org/gems/cff
 repository-code: https://github.com/citation-file-format/ruby-cff
@@ -167,7 +167,7 @@ year = {2021}
 #### APA-like format
 
 ```
-Haines, R. (2021). Ruby CFF Library (Version 0.8.0) [Computer software]. https://github.com/citation-file-format/ruby-cff
+Haines, R. (2021). Ruby CFF Library (Version 0.9.0) [Computer software]. https://github.com/citation-file-format/ruby-cff
 ```
 
 #### Citing a paper rather than software
diff --git a/lib/cff/version.rb b/lib/cff/version.rb
index 7d7d320..ba6b1c8 100644
--- a/lib/cff/version.rb
+++ b/lib/cff/version.rb
@@ -17,7 +17,7 @@
 ##
 module CFF
   # :nodoc:
-  VERSION = '0.8.0'
+  VERSION = '0.9.0'
   DEFAULT_SPEC_VERSION = '1.2.0'
   MIN_VALIDATABLE_VERSION = '1.2.0'
 end