diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2fa972d..9f6e766 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,18 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
-[Unreleased]: https://git.embl.de/grp-zeller/GECCO/compare/v0.6.2...master
+[Unreleased]: https://git.embl.de/grp-zeller/GECCO/compare/v0.6.3...master
+
+## [v0.6.3] - 2021-05-10
+[v0.6.3]: https://git.embl.de/grp-zeller/GECCO/compare/v0.6.2...v0.6.3
+### Fixed
+- HMMER annotation not properly handling inputs with multiple contigs.
+- Some progress bar totals displaying as floats in the CLI.
+### Changed
+- `PyHMMER` now sets the `Z` and `domZ` values from the number of proteins given to the search pipeline.
+- `gecco.cli` delegates imports to make CLI more responsive.
+- `pkg_resources` has been replaced with `importlib.resources` and `importlib.metadata` where applicable.
+- `multiprocessing.cpu_count` has been replaced with `os.cpu_count` where applicable.
 
 ## [v0.6.2] - 2021-05-04
 [v0.6.2]: https://git.embl.de/grp-zeller/GECCO/compare/v0.6.1...v0.6.2
diff --git a/gecco/__init__.py b/gecco/__init__.py
index 37a2fa0..fa2ab86 100644
--- a/gecco/__init__.py
+++ b/gecco/__init__.py
@@ -1,6 +1,13 @@
 """Biosynthetic Gene Cluster prediction with Conditional Random Fields.
+
+See Also:
+    *Accurate de novo identification of biosynthetic gene clusters with GECCO*
+    Laura M. Carroll, Martin Larralde, Jonas Simon Fleck, Ruby Ponnudurai, 
+    Alessio Milanese, Elisa Cappio, Georg Zeller. bioRxiv 2021.05.03.442509
+    `doi:10.1101/2021.05.03.442509 <https://doi.org/10.1101/2021.05.03.442509>`_
+
 """
 
 __author__ = "Martin Larralde"
 __license__ = "GPLv3"
-__version__ = "0.6.2"
+__version__ = "0.6.3"